Sown in Weakness, Raised in Power.

Tom Riddle went into the Potter home to kill an infant—he woke up face to face with a Dementor. There's a dead Black lying next to him that he can't remember having murdered, but Lord Voldemort has gotten out of worse situations than a spotty memory and a missing wand.

Trapped in Harry Potter's cursed life, Tom is racing against Albus' suspicions and his other self's attempts at a coup. The UK is only big enough for one of them to rule, and Lord Voldemort didn't become a Dark Lord just to take second place.

Betad by Eider Down.