During the Invincible War, a maskless Mark from an alternate dimension arrives, searching for his lost love, William, who was killed by Omni-Man in his world. This darker version of Mark, once forced to commit horrific acts alongside Omni-Man, only wants to find William-not destroy. As he helps fight the evil Invincible variants threatening the world, Mark earns the trust of the heroes and forms a bond with this world's William. Together, they rediscover love and healing, offering Mark a second chance at happiness and redemption.