While the Ninjas finally enter the front gate of the Mega Monster Amusement Park, they arrived upon fleeing and screaming people running away from the snakes. Glancing through a mobs of teens and children escaping for their lives. The Ninjas found the heart of the problem, the center of the Mega Monster Amusement Park. The Ninjas raced to the center, ready for battle.

Once the Ninjas arrive the area, there was Lord Garmadon relaxing above the roller coaster. The Ninjas are on fighting stance, wielding their weapons in grasp, ready for battle. While Lord Garmadon sneered to the Ninjas.

"Hello, you worthless scums." Lord Garmadon rudely said with a foul tone.

Kai was the one to rise and respond, defending his brothers "Why are you here? And where is Cole?"

Lord Garmadon shrugged his shoulder, he replied with a laugh "Whatever what you mean, Kai."

"You know who! Stop saying that you don't even know what you do!" Jay spat hoarsely, went to Kai left side.

"You have our brother! He-" As Zane went to Kai right side, he sensed a strong dark presence appear. Zane became petrified and the gangs notices Zane. Both raised a brow, eyed on Ice Ninja.

"Zane?" Both said together. Before the Ninjas react, the snakes pops out from their hiding spot. The Ninjas reacted and circled by the snakes. Lord Garmadon sat and lean back to see his favorite movie play.

The Ninjas, back to back with another whispered to their member "Got a plan guys?"

"Well, usually Cole make the plans. But we have to fight then without his plan," Jay suggested.

"Get ready brothers," Said Zane. The Ninjas waits; but Kai made the first move. The snakes and Ninjas sparred into battle.

Zane threw his shurikens at one of the Hypnobrai. Knocking them, unconscious. While the other takes its place, they charged without even thinking. Zane side sweep and uses his right elbow and strike the snake by the back of its head. The Serpentine crumbled into ground, unconscious. Another charges to him; pulling out his shuriken, he threw it to the snake, sent him flying.

Jay uses his Nun chucks and slammed some snakes while he rushes into horde of snakes. He preformed spinjitzu, colliding into the snakes, knocking lots of snakes. Adding a phase "Woo-cha!" "Hya!" Jay shouted. Slamming the snakes with a simple blow.

Kai, uses his katana, and land a blow on multiple snakes, knocking them unconscious. Few charge, swinging their snake weapons at Kai. Kai lunged backward, throwing his Ninja Star in process, staggering few of the snakes in sight. Landed on his feet safely, the snakes look frighten. They slowly trotted away and flee. Kai sigh and take a quick gaze on his brothers. Already finishes their side and saturated once more. The Ninjas are in fighting stance on Lord Garmadon.

Lord Garmadon sighed, the failure of the snakes. He was clapping his hands together. Taunting the Ninjas and Kai rose with a hard look.

"What- why are you clapping?" Kai snapped.

"Oh nothing. That was a beginning, you pesky Ninjas! Now for the real entertainment!" He laughed maniacally.

Kai was getting impatient, Lord Garmadon was playing games with them. Kai charges with a battle cry toward where Lord Garmadon stood. Out of nowhere, a shuriken threw from the sky stop Kai tracks in front of him. Kai flew back, taking few steps back and try to find the source who threw shuriken, interrupting him and Lord Garmadon. In the background, Kai heard Zane and Jay gasps. Kai slowly look over his head and saw. . . his leader Cole. Cole made his way through and reach to the concrete floor. Scythe on his grasp, blocking Kai view. Kai, gaped that Cole was different. It's not him. He knew by the leader, in charge to take care his teammates.

"That's what the dark presence I sensed in the bounty. It was Cole!" Zane shouted, hesitated pointing at Cole. Logic reasons of the mysterious power, not Garmadon.

Jay, became traumatized, flailing his arms and pointed at his good friend "H-him?! Cole?! H-he's fighting us?!" He shrieked, aiming his Nun chucks at Cole pulling Zane gi sleeve. Zane nodded.

"What did Lord Garmadon done to you?!" Kai yelled, eyebrows knitting in fury for what Lord Garmadon done to his brother.

Zane interrupted and went to Kai and whispered "Kai, I sensed Cole's heart has been corrupted."

Kai eyes changed to gruesome glare, he looked from Cole to Lord Garmadon. Became infuriated and yelled with all he got "WHAT DID YOU DO TO HIM?!"

Lord Garmadon slowly drawing his Mega Weapon and shows the Ninjas the reasons. The Ninjas and the rest gasps in unison. Speechless and Cole smirk with a foul chuckled. Kai curled his hands into a fist. Looking back at Cole, what Lord Garmadon has corrupted the Ninja's heart and take a stand to save him. Kai gone to fighting stance, no other option since his heart been poisoned by Lord Garmadon. Zane and Jay gasps, Kai fighting Cole.

"Kai! He's Cole! Why and what-" Jay shouted in worry.

"Jay, Cole heart and mind... it's not him." Acknowledged Zane. Predicting Cole was gone somewhere.

"It couldn't be!" Kai yells, lifting his fist directly above Cole "Lord Garmadon and his vile plans! You definitely going to pay for this!"

"You're not going to lay a finger on my master!" Cole interrupted.

"Master?!" Kai snapped, gaped for his leader calling him. " Cole, it's-"

Before the Ninjas react, Cole lunged himself to Kai. Kai pulled his katana immediately and blocked Cole's scythe. Zane and Jay ran to help but was cut off by Cole throw Shurikens to stop their tracks. Kai strength pushes Cole and sending him backwards. He dug his feet to the ground to regain his footage. Kai looked to Zane and Jay safety. Distracted for a moment, Cole kicked Kai and sent him flying. Zane and Jay grabbed Kai, saving his fall and help him to his feet. Cole, crepting close, holding his scythe pointing at his own brothers. Lord Garmadon claps his hands. The Ninjas couldn't even do anything to harm his leader.

Out of nowhere, a metal net came from the sky. The net trapped Cole inside as he struggled to free himself. Lord Garmadon rose where he sat and saw a mechanical suit coming to the Ninjas back-up. The Ninjas saw it was Nya, Sensei, and Lloyd parked near the Ninjas. Cole finally free himself from the net and growl. As the Ninjas helped Sensei to the ground, he raise his Bo staff at his brother. Before Cole sprang, Lord Garmadon commanded.

"Stop! We cannot fight them if they reunited,"

"Bring back my student, brother!" Sensei screamed to his brother; very indignant for messing with his students.

"Why would I? He belongs to me now. There's nothing for you to do." Grinning slightly while he turn his back from the Ninjas and Wu.

"Dad!" Lloyd shouts "Please turn him back!"

Lord Garmadon was tentative of his son. "Son, the Mega Weapon has a power to create, not destroy. I chosen my way and you chosen your way by leaving me!"

"But-" Lloyd uses a deep voice, looking at the ground sadly. Lord Garmadon interrupt "It's done, son. Cole, let's go!"

Cole obeyed and pulled something out from his pocket. While Lord Garmadon left him, Kai rushes to Cole. "Cole! It's me, Kai! Please, I know there's somewhere inside you-"

"Shut up! I don't need to listen your pity." Cole said coldly.

"Cole! Don't you forget you have a fidelity of being a Ninja!" Nya yelled.

Zane joins in "Brother, please remember. Are we still playing and collecting the comebacks points? Please-"

Cole suddenly held his head, eyes shut tight. Zane sensed Cole's heart flickered for a moment until it consumes in darkness once more. 'Could it be? If we to reminisce the event we had done?' Zane thought.

The Ninjas, Nya, and Sensei still curt but hardly noticed Cole sudden changes. Cole snaps out by shaking his head and uses Ninja smokescreen. Kai tries to grab Cole but vanished immediately where he stood. Instead Kai landed on his belly gliding through the concrete floor. Zane and Jay rushed to Kai and help him to his feet.

"Cole... he's gone." Kai said, weakly. The Ninjas glances each other; Wu looked disbelieved and Nya remained silent. Brother had gone to the dark side.