Fatal Flaw

Summary: Danny has gotten sick, and it's up to Vlad to take his place as ghost fighter, along with Sam and Tucker, while the Fentons stay and home and take care of Danny. Then Vlad gets sick. Now they have two sick ghosts and no answers to any of their questions, the main one being "What's wrong with them?"

Author's Note: Sequel to "Polar Opposites". You don't have to read that one first, but you do need to know some key points from that story. One: Maddie knows both Vlad's and Danny's secret and accepts them both. Two: Maddie cares a lot for Vlad, even though she doesn't show it much. Three: Tucker can't sing. But the third one you probably already knew. Another thing, Jack doesn't know about Vlad's and Danny's secrets yet, but he will soon. Thanks to all who reviewed "Polar Opposites" and I hope you enjoy this sequel.

Chapter 1

"You can't dance, either, Tuck," Sam stated matter-of-factly as Tucker stumbled over his own feet. "Danny's a much better dancer than you."

"You would know," Tucker mumbled. "He's probably also a better kisser." Sam turned red and looked at the leg of the couch.

"Actually…" she said, and was about to say more when Danny entered the room.

"Hey, guys," he said. "Glad to hear that racket is over with. Seriously Tucker, you need to just stop singing. Forever."

"Way to make a guy feel better, Danny," Tucker joked. "At least I'm not afraid to sing in front of people Mr. I-Only-Sing-To-Myself-In-The-Shower-When-I-Think-Nobody's-Listening." Sam looked up at him weirdly.

"Wow, that was a long name for Danny. I don't think he could remember it," Sam said, and Tucker frowned. Sam started laughing and Danny narrowed his eyes.

"I do too sing in front of people," he said. "Remember the talent show in fifth grade?"

"Oh, you mean the one where you froze up and caused me to sing solo?" Sam asked, raising an eyebrow. Danny shook his head in frustration.

"Well at least give me credit for trying," he exclaimed.

"What's all the ruckus in here, Daniel?" Vlad asked, walking into the room. "Your mother says that lunch is ready, if you wish to eat." The three teens eagerly rushed past Vlad. "Your welcome," he said harshly to the empty room, then turned around to go back into the kitchen. What he saw in there was not what he expected.

"Danny!" Sam said, falling to the floor. She, Tucker, and Jazz were all on the floor, trying to wake an unconscious Danny Fenton.

"What happened?" Vlad asked. Sam and Tucker looked up. Tears were threatening to fall from their eyes.

"I don't know, he just collapsed," Tucker explained, then turned back to Danny. "Come on, dude, wake up."

"Jack, we have to do something," Maddie said, tugging the large man towards her son. "Jack!" She turned to him with a look of worry, but she noticed his gaze and turned to see not her son, but Danny Phantom. "Oh, God, what's happening to him?"

By this time Vlad was on his knees, trying to find a pulse in Danny's neck. He knew there was one, he had one as a ghost as well, but it would be very weak. He sighed in relief as he felt the artery pump blood up to the brain.

"Okay, let's get him up to his room. He's very ill," Vlad said. Jack picked up the ghost boy without question and took him upstairs. As soon as Jack was out of earshot…

"What is going on?"

"Is it something to do with a ghost?"

"What did you do to him?"

"Why is he like this?"

"Is he okay?"

Vlad was bombarded with questions and tried to answer them as best he could. "I don't know what's going on, Tucker. When I came in here, he'd collapsed onto the floor. It could very well be high blood sugar. I don't know if he's alright or not, and I certainly did not do anything to him," he said, glaring at Sam, who had asked the question. "And it very well may have something to do with a ghost."

"Is that why he's half ghost?" Jack asked sadly, entering the room. "Danny's in his bed. He will be fine everyone. Sam, Tucker, you should go home. Vladdie, you're staying here with us. You seem to have a lot of answers. Do you know a lot about his condition? His ghost condition, I mean." Vlad sighed.

"Actually, I do," Vlad said. "I know all about his half ghost state, because, well, I am one as well." With that he changed into his ghost form, Plasmius, and Jack stood there in shock for a moment before he opened his mouth to speak.

"You're… the Wisconsin ghost?"