Ultron is back and unleashes his army of ultimates - adaptoids that mimic the Avengers' powers, which leaves the Avengers scrambling not only to save the world but themselves.

Twin brothers Wiccan and Speed of the Young Avengers are boys without a past. When Wiccan's powers spiral out of control, the team sets out to find the one person who might be able to help: the Scarlet Witch, who may be the twins' mother, and whose own uncontrollable powers once almost destroyed the Avengers and nearly wiped out the mutant race.