Okay, this is just a story which popped into my head and wouldn't leave me alone. However, I still want to focus on Opposites, so this will probably be uploaded at a slower rate. This story is just for fun and all characters belong to their owners.
Dumbledore was most disgruntled when requested for assistance at St. Mungo's Hospital that evening. He had just finished waltzing with Madame Maxime when an urgent owl arrived from Mrs Longbottom. Quickly and politely making his excuses to the other headteachers, Dumbledore made his way to the magical hospital.
The fact that he was being summoned here was highly unusual and Albus wondered what Augusta found so important that she felt the need to interrupt a night of international cooperation. Frowning, Dumbledore realised that Augusta had never apparated Neville to the school gates like their agreement had stated. He hoped nothing bad had happened to the youngest Longbottom, especially after what had happened to his parents.
Taking the stairs to the ward indicated on Augusta's letter, Albus' unease deepened further for it was a private ward he had never been in before. Two of the beds were occupied; one with a sour faced woman dressed in a matron's outfit, while the other Albus couldn't immediately see because of the crowding around the bed.
"Good to see you've finally arrived, Headmaster," Kingsley Shacklebolt told him.
Dumbledore smiled amicably. "It took a while to make my excuses. May I ask why you have brought me here?"
"Look," Augusta said, nodding towards the bed. "Was Lucius Malfoy's son at the Yule Ball just now?"
Dumbledore glanced at the occupied bed and this was one of the very few occasions where he was taken entirely by surprise. "That's impossible."
He distinctly remembered the Malfoy boy at the Yule Ball wearing black dress robes and dancing with his simpering girlfriend. His mind ran through all the possibilities: polyjuice perhaps? Severus had been complaining about missing potions ingredients lately...
"Are you sure that is really Mr Malfoy? Not a fake?"
Shacklebolt nodded. "I have run several diagnostic spells and that is in fact the real Draco Malfoy. The more startling fact though is that from interviewing what few hospital staff knew of his presence, he's been here for several years."
Dumbledore's eyes widened. "That's most curious. Of course, it begs the question who is the boy up in Hogwarts?"
"The child's traumatised, Albus!" Augusta exclaimed. "He was trying to escape after being locked up in this room for so long and from what we can tell it's Lucius himself who has paid for the boy to be kept here!"
Neville remained quiet. In all the years he had been visiting his parents, he had never imagined that someone was being held prisoner just across the hall and for that person to be Draco Malfoy... Neville wasn't sure what to think.
Dumbledore looked down upon the form of the sleeping boy. "Has his father been notified?"
"Given the circumstances, the aurors have decided to arrest him for the time being." Kingsley stated quietly. "We're not sure what's going on exactly, but someone's impersonating his son and the original has been locked up - something that he has privately funded. Whatever's happening, it sure doesn't look good."
Thinking carefully about this new development, Dumbledore planned his next move. "I'll collect the Malfoy look-alike and deposit him at aurora headquarters for questioning tomorrow morning, Kingsley. For the mean time, I will escort Mr Longbottom here back to the school, I'm sure Miss Weasley is tired waiting for you." He added kindly.