This Wally West is a terrified refugee from the darker Absolute Universe, where his powers are a dangerous mutation and he is hunted by his own father. After a panicked, accidental vibration through the multiverse, he finds himself stranded in the bright, hopeful world of the main DC universe. He's desperately impersonating his confident, heroic doppelganger, terrified that if the Justice League discovers he's not their Wally, he'll be seen as a threat and locked away.