Doctor Doom returns to Latveria in hopes to regroup, but discovers that his mother Cynthia "Coco" Von Doom is free from captivity, has brainwashed her captor Chthon, and has turned his castle into a day-spa trap that has ensnared the Super Hero Squad!

After being thrown into a portal by Dark Surfer, Thor befriends a Korbonite janitor named Beta Ray Bill, and must give up Mjolnir in order to prove that he has excellent fighting skills.