Hulk finds himself aboard a spaceship where he is pressed into service. Hulk settles into this new life with alien comrades, even though the first mate of the ship is the Abomination, one of his most hated enemies. After the Abomination tries to kill him, Hulk is brought before the ship's half-human and half-robot captain, Cybor, who explains the cause of his quest to track down and kill the monstrous Klaatu. As the ship's crew has a final confrontation with Klaatu, Abomination starts a fight with the Hulk and both of them battle as they fall back into Earth's atmosphere.