I don't own Danny Phantom.

Maddie Fenton walked silently down to her lab. Today would be the perfect day to work on her own weapons. Jazz was at a friend's house, Danny was out, and Jack was at a ghost hunting convention. Basically, she had the house to herself.

Or so she thought.

Vlad Plasmius floated invisibly behind her holding a struggling Danielle Phantom (who was in her human form).

"A smart woman your grandmother is," Vlad whispered to the clone girl.

She growled and narrowed her eyes. "Let me go, Plasmius, and you'll see how smart women can be."

He chuckled darkly. "Always with the threats and witty banter, just like your father."

Maddie heard him this time. She turned around, purple eyes narrowed. She put on her goggles, allowing her to see the ghost.

There were two of them, both invisible. The larger one was holding the smaller one by the wrist.

She shot an ecto-gun at them.

Vlad let go of Dani's wrist and they went flying in different directions, losing invisibility. The girl went tumbling across the room before landing in a heap on her stomach. The man went flying in the other direction, hitting the wall and falling to the ground to land on his back.

Maddie instantly recognized the ghost as the Wisconsin Ghost although she didn't recognize the girl. A few steps towards the girl and Maddie noticed the girl was actually a human with raven black hair.

Dani groaned and got up. Her eyes widened. "No!" she yelled, charging past Maddie to go kick Vlad in the face.

"You shouldn't do that, girl," the half-ghost taunted. "I have leverage." He pulled out a tablet and showed it to her.

She grabbed it from his hands and gasped. "Daddy!"

Vlad handcuffed her right hand and Maddie's left hands together.

The huntress looked over the girl's shoulder to see the tablet. On it was Danny Phantom, bruised and battered with ectoplasm leaking from the side of his mouth tied up in a glowing cage.

One thought clicked in her mind as her consciousness slipped away.

This girl was Phantom's daughter.

…

The first thing Maddie saw when she woke up were blue sneakers. Just blue and white sneakers. They weren't even new. There was a layer of dirt encasing the once obviously pure white bottoms.

Maddie looked up to see who owned them. It was Phantom's daughter.

The girl was examining her surroundings. "Okay, Plasmius threw us into the Ghost Zone. Daddy's lair is that way past Clockwork's lair, the Kingdom of Aragon, and the Far Frozen. So we can stop by Clockwork's, let him give us a hint on the future, head to Aragon and have Dora remove these handcuffs, and then head to the Far Frozen to rest before we go to the lair and go home."

Maddie raised an eyebrow. The girl had definitely inherited Phantom's good planning skills.

"Good morning, Sleeping Beauty," the girl said, sarcastically. "Sleep well?"

Maddie blinked and examined the girl. Her raven black hair was up in a ponytail with a red ponytail holder. She wore a red beanie over her hair. Her bangs drooped lazily in her icy blue eyes. Her skin was pale compared to Phantom's slightly tanned skin. She wore a blue sweatshirt and red shorts along with her blue and white sneakers.

"I slept just fine, thank you," Maddie said, ignoring the girl's sarcasm and eye roll.

"Your name's Dr. Fenton right?" she asked.

The huntress nodded.

"I'm Danielle Phantom, Danny Phantom's daughter," the girl continued. "But you can call me Dani. With one 'N' and an 'I'."

The two stood awkwardly for a second, Maddie observing Dani and Dani staring at her dirty blue sneakers.

"Um," Dani said, awkwardly. "My dad's guardian is not too far away. He's the Master of Time so he can hint us on how this is going to play out." She looked around, ponytail flying. "I'll tell you what else we're gonna do when we get there."

Maddie tapped her foot impatiently. "And how exactly do you expect us to get there? We're stranded on a floating rock? What do you want us to do? Fly?"

Dani smirked Danny Phantom's famous smirk. "That's exactly how I expect us to do it." She picked up a rock and tossed it in the air. It stayed there hovering. "The Ghost Zone has no sense of gravity. And object can fly in here." She jumped into the air and did a backflip, hovering there. "See! Come try it!"

Maddie hesitantly jumped up and hovered there. "Whoa!" she said as she flipped upside down.

Dani giggled and went to help her stay upright. "Flying's hard the first time. Daddy almost took out half of his hometown the first time flying."

Maddie almost grinned at the thought but was more worried at the damage from that.

The girl grabbed her grandmother's hand. "C'mon. To Clockwork's!"