Prologue
It was an unusually quiet twilight on Warwick Avenue. He wandered down to almost the end. He came to a stone, two story house with a red door. It had an air of aristocracy, yet it was warm, welcoming. That is, until he was done with it, he thought to himself.
The house of James Sirius Potter and his wife Melinda loomed above him as he walked up the cobblestone path to the front door. He could hear footsteps wander off the other way. He guessed that they belonged to the daughter, eleven-year-old Abby. He would leave her alone, for she hadn't gone to Hogwarts yet. So defenseless and weak, it wasn't fair to kill her.
As soon as the footsteps were far enough away, he opened the door quietly and readied his wand. He saw them around the corner, and he muttered the final words. He saw the body of Melinda slump. James immediately jumped up and pointed his wand at him. He then blocked the killing curse. That was fine, "Expeliarmus!" He yelled as he disarmed Mr. Potter.
"Please, leave my daughter alone," He pleaded with him. "Let me write her a quick note before you kill me." He wasn't an unreasonable man.
"I'll give you five minutes." He growled at James.
James grabbed a sheet of paper from the table beside him and wrote what he presumed was the fastest he ever had. He was done and he lied down on the floor with the note clutched in his hands and a necklace of some kind.
The intruder pointed his wand at James's forehead and muttered the curse that ended it all. As soon as he came, he left. The door creaked on its hinges, left open. He would be back for Abby when she was old enough to put up a proper fight. The prophesy predicted it, only one could live. He walked away, back down Warwick Avenue, cackling evilly as he went.