Being haunted by a teenage Dark Lord who was supposed to be gone is hardly pleasant. Then again, when said Dark Lord's continued existence depends on Harry's own, he becomes an ally Harry would be a fool to ignore. Even if he's controlling and a dramaqueen with a penchant for sadism. Futur TomHarry. Opportunistic!Harry M for gore and violence in later chapters

Revealed knowledge during Tom Riddle's years abroad considerably changed the path of History, sending him back to Hogwarts five years early. Harry Potter, orphaned on Samhain 1981 on some unknown party's orders, must carve his own place in a world split by schemes and prejudices. "Good and Evil are overrated anyway." Rating might go up later.