In the sewer, Michelangelo skateboarded making loop de loops as he did.

He shouted "He is the Alpha dog! The thrash meister! The undisputed God of the half-pipe!"

"Wahoo!"

Raphael skated in his roller skates behind him "Who needs half pipe we've got full pipe!"

"Wahoo!"

"Alright!"

The two of them rode into the lair. Leo and Donnie followed behind, one on a scooter and the other on a bike.

Donnie went up a ramp and exclaimed out "Going for Amplitude!

Leo followed after, on the same ramp, and grinds a table "Going for grinditude! Woo!"

Splinter walks out from the kitchen holding a tray with teapot, two cups and muffins. Leo speeds past him
"Excuse me sensei!" He calls out as he rides past his master. Splinter walked over to the couch where Yuuki was sitting in and sat down the tray on the table by the TV.

"Heads up sensei! I mean down!" He heard Donnie shouted out from behind. Splinter quickly ducked as the turtle jumps over on his bike. Splinter pours the tea into the cups then looks over to his right, annoyed. He jumps over the table just as Raph skates by, easily landing on the other side.

"Nice recovery sensei!"

Splinter let out a sigh and reached down to grab a muffin, but Michelangelo grabbed it "Hey thanks sensei!"

Splinter sat down and tried to turn on the TV but all off a sudden the entire lair went pitch black as the electricity went out. Yuuki heard a crash as the turtles collided into each other.

"Nice wiring job, don." Mikey comments, sarcastically

"I guarantee is not my wiring. Maybe it's a blackout?" Donnie answered him

"Maybe. Now, you want to get your foot off of my shell?"

Splinter lights a match and ignited a candle. The turtles were in a pile tangled up in each other.

"Ah, keep that flame away from Mikey. He scarfed down a while chili pizza for dinner." Leo warns as they tried to untangle themselves.

"Clearly, there is a power failure. I suggest that you investigate and see if it can be fixed." Splinter tells them

We're all over it!" Mikey quickly answers. He picks up his skateboard. Raphael puts his wheels on his skates away. Leo folded up his scooter and Donnie folds up his bike.

Mikey looks over at Yuuki "Do you want to come along?"

She turned her head looked at Splinter. He smiled and gestured towards the brothers "Go. We can discuss whatever you want to tell me, later."

Yuuki stood up and ran after the brothers, as they ran off with their rides, following behind them, trying to catch up.

"And hurry up. I do not wish to miss my favorite program." Splinter calls out.

He silently watched as they left. Running his hand down, rubbing his short scruffy beard. For a couple of days, he noticed that there was something distressing the young woman. She had dark circles that were beginning to form around her eyes, from lack of sleep. She was extremely jumpy and alert. She would jump at any loud sound making her eyes dart around wildly. Whenever he and his sons asked her what was wrong she would dodge their questions. There was something that was obviously bothering her. He was shocked as well as pleased when she approached him timidly asking if they could talk. The old rat let out an long tired exasperated sigh.

Kids...

From a tall building, the brothers and Yuuki perched over the city on top of a water tower to only see darkness. No lights, a total blackout. Leonardo commented "You know, I don't think that Splinter meant that we should investigate this far."

Raphael answered "You can never be too through especially when it comes to topside time."

Donatello explained "This whole side of town is dark. A substation must have gone out."

Leonardo frowned "This isn't right. Shouldn't there be some emergency lights or something?"

Raphael replied "Yeah, it's totally dark down there."

"Which means there's only one thing for us to do."

Everyone looked at each other making a mischievous grin.

At the staircase in front of a museum, Raph and Mikey grinded down a railing.

"Banzai!" The turtles shouted.

Leonardo stopped his scooter and asked "Guys, do you really think that we should be doing this? What if somebody sees us?"

Raphael smirked and retorted "That's the beauty of bit, Leo. Nobody can see us. It's pitch black."

Michelangelo replied "Get with the program bro. It's a once in a lifetime opportunity to session some surface terrain.

Yuuki watched in silence as they have fun. She wasn't exactly a sports type person and wasn't the best skater or bike rider. She had zero balance. Michelangelo noticed, and skated over to her. He grinned and held up his skateboard handing it to her "Wanna try!?"

Yuuki quickly shook her head "No, I'm terrible at it."

Michelangelo persisted "Come on! Live a little! If you fall off I've got ya! Don't worry!"

Yuuki looked at him then at the board then took it from him setting it down. She placed her foot on top getting ready to push off. As she did she tensed up as she saw the board started to move slowly. She quickly frozed not moving a muscle.

Michelangelo commented "You're not going to go anywhere if you don't move."

Yuuki shouted "I want off!"

Michelangelo replied "What?! But you haven't even tried it yet! "

Yuuki yelled "Get me off of this thing!"

Michelangelo replied "Just try it! Look, I'll give you a little push. I won't let go. I promise!"

Yuuki quickly shut her eyes as she felt a push. She slowly opened then looked down to see herself moving. She felt a surge of adrenaline rush through her. She made a small smile "Okay you can let go. "

She heard Michelangelo answered "Oh, I've already did! "

Yuuki's eyes widen in disbelief. What?!

She looked behind her to see Michelangelo grinning.

"Yep! You've been riding all by yourself!"

Yuuki shouted "You lied to me!"

"Oh come on! I did it to give you confidence and look at you! You're awesome!"

"Except I don't know how to stop!"

Michelangelo quickly shouted "What? Use your foot!"

Yuuki quickly slammed her foot down but as she did she was catapulted off of the skateboard, losing her balance. She quickly shut her eyes expecting pain but she felt nothing. Slowly she opened her eyes to be met with a yellow plastron and blue. She looked up to see Leonardo looking down at her "I think that's enough riding for now."

Yuuki blushed as she felt her face grew red and she quickly got off of him.

Donatello quickly rode over and whispered and pointed "Hey check this out."

The three brothers and Yuuki looked to see two ninjas dressed in black climbing up the side of the building. Yuuki frozed in her spot.

Mikey asked "Didn't we fight those clowns before?"

Donatello answered "Yeah, and we nearly got waxed."

Raphael smirked and twirled his sais "Who's up for some payback?"

Leonardo looked at Yuuki "You wait out here and stay hidden."

Yuuki softly answered "But... "

The blue masked turtle cut her off and interrupted "These guys attacked you and whoever they are, they're obviously after you. And you can't fight. Don't argue this time. "

Yuuki frowned "Fine. "

As she saw the brothers run into the build she whispered softly "Be careful."

Inside of the museum, the two ninjas walked over to a glass case containing a sword. One used a device to cut a circle on the glass without raising the alarm. The other one wore a metal glove. Just as they tried reach to grab the sword, a shuriken flew last and land on the case beside them.

"Gift shop's on the first floor boys but they don't take kindly to shoplifters and neither do we." Leonardo replied

The first ninja drew his sword while the other tried to make another attempt at the case but another shrunken was thrown.

Raphael smirked "Now, before you try to make off with the goods. You might want to consider a few things. One, you're outnumbered. Two, don't let the pretty faces fool you. We're tougher than we look."

Michelangelo nervously answered "And three, don't we're about to get our butts seriously hammered!" as he saw more ninjas jumped down from above surrounding them.

An ninja attacks Leo with a staff but he raises his katanas and sliced it half. As he did blades came out from the ends. He charged at Leo, who blocked the blades with his shell, breaking them. Leo raised his leg and kicked knocking the ninja into another.

"Whew! Saved by the shell!"

Raphael spun around in his skates "Check it out blades in blades!" He and a ninja with a sword charged at each other. He jumped and flipped over them as they sliced, who ended up slashing a couple of cases instead.

Raphael made a smug smirk "You break it pal. You bought it!" He skates away as the ninja chased after him.

"Speaking of buying!" Then he quickly turned around and punches them sending the ninja flying into a gong.

Donatello faced off with an ninja with a naginata. He got on his bike and rode towards them. He raises his bike uppercutting the ninja sending them flying into an armour display
"Alleyoop!"

He noticed another ninja runs in from behind. Donatello pulled out his bo staff
"Charge!" He yell and knocks them into a large vase.

Michelangelo skated on his skateboard "Wahoo! Bowling for ninjas!" He knocks one ninja into two more. He twirled his nunchucks taunting "Na-Na-Na-Na-Na!~" An ninja with a kusarigama threw the chain wrapping around the turtle's arm.

"Uh-Oh, Heads up!" Mikey replied as he jumped raising his skateboard hitting the ninja squarely in the chest, knocking them down.

"Way to pick up that spare!" He reached down ripping off the symbol of the ninjas outfit

"And a trophy to boot!"

Three ninjas surrounded Leo as he tried to fend them off with his swords. He struggled as he tried to push them back "Little help here!" He called out to his brothers.

They all rushed towards him "We're on it!" The ninjas jumped out of the way and the brothers collided with one another.

Mikey groaned and commented "I sense a teamwork training session in our future."

"Double-time, they're getting away!" Leo ordered

The ninjas started to escape. One with the metal glove quickly runs back to the display case and grabbed the sword, pulling it out. The brothers quickly blocked them. The

"Just put the sword back, Sparky. We'll call it a draw." Raphael replied

The ninja raised the sword and light emitted and resonated from it. A shockwave blasts out knocking the turtles back. Leonardo groaned holding his head as he slowly sat up on his knees. He quickly looked up to see the ninja sending over him raising the sword above their head getting ready to bring it down. He quickly blocked it off with his katanas. Light began to emerge again from the sword. Leonardo struggled to push it away from him but it was inching closer to his face. He was still recovering from that first blast, now this!? No! It cant end here! Not like this!

Then suddenly, vase flew by, past Leo, instead, hitting the ninja in the face. The ninja was knocked back and Leo looked behind him to see Yuuki.

"What are you doing?! Get out of here!" Leonardo shouted

"You're welcome!" Yuuki frowned as she replied

The ninja groaned as they held their head then turned their attention towards her. Yuuki's eyes widen as she saw the ninja narrowing their eyes directly at her. She began back up as she saw them slowly starting to advance towards her.

But, a ninja stopped them "We've got what what we've came for! Come on!" and they both escape. Distant sound of police sirens are heard.

"How about best two out of three?" Mikey asks

"What was that sword?" Donatello wondered

The sirens began to grow closer.

Leonardo quickly commented "Hold that thought. We've got to book it!" and the all quickly left.

At the lair the turtle and Yuuki showed Splinter the symbol that Mikey ripped off from one of the

"What does the symbol mean Master Splinter?" Leonardo asked curiously

Splinter frowned and simply answered "Trouble."

"Who are these ninjas?! Where do they come from?! Who do they work for?!" Raphael questioned

"What do they want with a magic sword?" Mikey asked

Donatello commented as he explained "Nope, not magic. Probably more of a self-perpetuating oscillating frequency generator."

Mikey looked at him confused "Um, in English, Einstein?"

Donatello answered "It packs a shock wave that will knock you flat on your shell."

Raphael exclaimed "We gotta go after these creeps!"

Splinter snapped looking at the brothers sternly "No. A wise ninja does seem out an enemy he does not fully understand."

Leonardo replied "But sensei, Bushido demands that we've right for honor and justice and -!"

Splinter answered harshly "Bushido also demands that you honor your master's wishes!" The brothers and Yuuki eyes widen in shock, staring at him silently.

Splinter answered "I will meditate upon this matter further, goodnight." He slid the door to his room shutting it.

"Underground, again." Michelangelo complained

Yuuki let out a tired yawn and rubbed her eyes "I'm going to take a nap."

Michelangelo replied "You can rest in my bed if you want?"

Yuuki made tired smile "Thanks." and she walked off towards his room.

Donatello thought for a moment then an idea flashed in his head. He quickly runs towards his lab.
Raphael asked "Where are you going brainiac?"

Donatello walked over to his computer and answered "There's more than one way to seek out your enemy." quickly typing away on the keyboard.

Michelangelo sat on the couch reading his comic book eating chips then he looked behind his shoulder staring at Splinters room "What's up with the big cheese? He's been zoning in there all day."

Leonardo replied "It's that ninja symbol it's got sensei all weirded out." as he practiced his katas.

Raphael punched his punching dummy "Enough of this waiting around. I'd say that we head topside kick ninja butt, take ninja names and find out the whole ninja story for ourselves." He kicked the top with so much force that the head came off and flew landing in a bag of chips that were laying next to Michelangelo, making him jump.

Michelangelo replied "Whoa, remind me never to get on your bad side, dude."

Raphael replied "Too late." and began walking towards the lair entrance

Leonardo quickly blocked him preventing him from leaving "Hang on, Raph. No one's going anywhere."

Donatello shouted from his lab while on his computer "Hey guys! Check this out! I've hacked into the power company's computer system. Looks like there's another blackout down by the South street seaport."

Raphael replied "I smell a rat and I don't mean Splinter."

Leonardo answered "Hang on guys. Splinter told us-"

Raph pointed out as he interrupted "Not to go after the ninjas. He didn't say anything bout not investigating power failures." He walked away along with Donnie and Mikey behind him.

Donatello replied "Excellent, I have a few new surveillance toys i want to test."

Leonardo let out a sigh and quickly ran after them "Wait up! It's tough being a leader."

They all left the lair. Unbeknownst to them that Splinter was watching as they did.

At the bridge, in the middle of the night. The brothers looked to see the whole part of of town was pitch black.

"Total blackout. Just like last night." Raphael replied

Donatello explained as he dug through his bag "But this time I've came prepared." Then he pulled out a pair of goggles.

Michelangelo quickly grabbed them, putting them on "Awesome! Total turtle vision!"

Donatello took them back and correct corrected him "Night vision, actually."

Leonardo asked "How do we survey such a large area?"

Donatello pulled something else out from his bag "I've came prepared for that, too. I've been dying to try this puppy." He unfolded it, setting it up, a hang glider.

Leonardo raised an eye, concerned "You mean you haven't tested it yet?!"

Michelangelo argued "Dude, how do you test a flying machine in the sewers?"

"We'll stay in touch via shell cell. I've worked out all of the theoretically aerodynamics." Donatello runs off towards the edge of the bridge and jumps off "It's practically full- and started gliding "prooof!"

Raphael replied sarcastically "But, is it Don, proof?"

Donatello heard Leo through his shell cell "Don, Don?!"

Donatello answered "I'm okay! No, problem! Just forgot to compensate for the wind drag on my bo staff. He noticed a strange beam emitting from a cannon hitting the water "Guys I'm picking up something strange down on the river."

"What is it?" Leo asked

Donnie answered "It looks like they're searching for something under the water."

Leo demanded "Who's searching?"

Donatello scanned again to see two technicians with the same red symbol from that the ninjas were wearing earlier. He reported "It's our ninja buddies again. They have that sword they stole rigged up to some kind of vibrational cannon. I'm over on pier 16."

Leo replied "We're there."

Donnie went in closer towards the beam of the cannon "I'm going in for a closer- LOOOK!" but he accidentally got caught in it and began to spiral out of control.

Leo answered concerned "Don! What is it?!"

"Mayday! Mayday! I'm going down!" Donatello guided the glider towards the water and landed in it.

Leonardo, Raphael, Michelangelo chewed static on the other end of the shell cell then silence.

Leo quickly replied into the shell cell "Don, can you hear me? Say something bud."

Then they heard Donnie gasp on the other end as he came out of the water "Man that water stinks! And this is from a turtle who lives in the sewers!" and commented.

"Yes!" The three turtles smiled happily and exclaimed as they pumped their fists into the air. They kept moving until the cannon came into their view.

"I have a visual on the cannon. I only see two guys but that just mean the others are hiding." Leo explained. Just as he did, several ninjas appeared from a nearby boat, surrounding them.

"I hate it when he's right!" Mikey muttered

"Let's turtlelize em!" They three brothers shouted out. They fought more ninjas on the boardwalk. Then Leo jumped onto the boat and fought the others that were on it. Meanwhile, as Donnie was running along the boardwalk trying to regroup with his brothers. He was ambushed by several ninjas who were hiding in another boat. He jumps onto to it and fought them. Raphael climbs up the net attached to the mast of the boat. A ninja uses a man a and cuts it. As Rapheal fell, he quickly pulled out his sai and stabbed the bottom of the pole stopping himself.

"Why you!" He glared as two ninjas surrounded him and let an irritated growl

Michelangelo grinned as he backs up twirling his nunchucks at the ninjas "Avast scurvy sea dogs! Arrg! Shiver me timbers and blow me down!" He laughs until he bumps his shell up against a wall. He turned around looking at them nervously

"okay, about that blow me down part?" They charge at him but a sail falls landing on top of them. Michelangelo looked up to see Leo.

He grinned and exclaimed "Thanks, bro!"

Raphael fought two ninjas until one with a kusarigama threw the chain at him and he blocks of with his sai.

He smirked "Nice try, dipstick." The other ninja wraps the chain around Raphael 's legs and he trips over the railing hanging upside down. The other ninja jumps down and raises the blade getting ready to swing it down. But Leo quickly swings in on an role and cuts Raphael down and he land on top of the ninja.

"Who says that i've never cut you a break?"

Raphael stands up and shrugs and twirled his sais "Not pretty but I'll take it!"

Donnie faces the two ninjas and throws them both onto a life boat sending them down to the water. Then he regrouped back towards the three turtles.

"I think this teamwork effort gets the most improved." Leo replied

Donatello looked over towards the cannon "School's not out yet. " Then he saw a helicopter above it and pointed

"That's one cool shell chopper!"

Michelangelo saw it pull something out of the water from what appeared to be a suit of armor "What's up with barnacle bill?"

Raph commented "Whatever it is, it can't be good." and it flies off.

The turtles quiche headed towards the cannon. The two technicians turned it off and was about to leave when Leo appeared from the edge of the scaffolding
"Now boys, there's a small matter with some stolen property as need to discuss."

They panicked and began to back up until Donnie appeared on the other edge
"Dude, you really shouldn't be playing with such dangerous toys." Raphael appeared beside him. They ran off in a different direction until Mikey appears on the other edge making an angry face. One of the techs tried to shoot a laser at him. Mikey ducked down narrowly dodging the beam. Leo climbed up and kicked the tech and the laser gun let out another beam hitting the cannon making it to haywire. It came on letting out a beam from the sword connected to it and began to spin out of control until it aimed at the docks towards the city.

"It's overloading! I can't control it!" One of the tech tried to stop it

The other one shouted "Who cares we're leaving!" and the helicopter came back and they jumped into it.

"They're getting away!" Raphael shouted

"I think we've got bigger problems." Donnie pointed out

The cannon blasted the shore of the docks causing it to crumble.

"Talk about bad vibes!" Mikey replied

"Not funny, Mike." Raph retorted

"Don, can you shut it down!" Leo shouted

Donatello climbed on top of the cannon and he used his bo staff to open up the panel "Well I might be able to disconnect the sword from the accelerator but crossing the power terminal could result in a feedback loop. It might -"

Leo shouted "Donnie, whatever!" Then he looked at Raph and Mikey and ordered "Meantime, let's point this thing away from civilization!"

As they tried to push the cannon away, a police copter appeared "This is the police! You on the pier stop where you are!"

"Hurry up don! Before we end up on America's most wanted Reptiles!" Raphael exclaimed

"Almost there..." Donnie informs them. He pulls a cord and the cannon started spinning knocking him off.

Leonardo shouted "We've got to steady this thing!" He noticed a crowbar and grabbed it and held the cannon in place. Donnie reached up and grabbed the sword but pulled his hand back as It shocked him "Ow!"

Leonardo saw the glove and tossed it over to him "Here try this!"

Donnie put it on and grabbed the sword. As he did the cannon immediately shut off but during the struggle the scaffolding was beginning to weaken and started to wobble.

"Let's get out of here!" He yelled

The brothers quickly jumped down just in time as it started to call into the water along with the cannon. The cannon caused a blue explosion as it went underwater.

"Whoa, awesome light show." Mikey replied

They saw the police copter began to come closer

"Speaking of light shows." Leo pointed out

The brothers quickly avoided the lights from the copter and quickly vanished, disappearing, leaving without a trace.

At the lair, they showed Splinter the sword and he studied it while wearing the glove
"The design is unmistakably 11th century Japanese but the metal is unlike any that I've ever seen. "

As He explained to them. Then placed it on a stand "Clearly, there is more to this sword than meets the eye. Best that it remained out of the wrong hands."

As everyone went off to their own things. Leonardo walked by Michelangelo's room and peeked inside. He saw Yuuki, whom appeared to be sleeping peacefully, curled up in the bed. He walked over to the side of the bed and gently brushed her hair out off her face. He made a small smile then turned around walked out, leaving her alone.

"Thank you."