In an effort to prevent Skeletor's evil, Man-At-Arms invents a groundbreaking crystal belt that weakens the villain every time he performs an evil act, or even thinks about doing so. Skeletor is horrified to learn that he can never be evil again, but his Evil Warriors have other ideas. As the heroes believe more peaceful times are upon them Tri-Klops presents to Skeletor a harness, one that will turn He-Man's goodness against him!

When Orko's role of overseeing the gardens at the Royal Palace proves to be a lot more difficult that he first expected, he journeys to the Evergreen Forest to seek out Moss Man. Orko takes some seeds from a strange creature who claims to be Moss Man, only to have the resulting vines overthrow the Royal Palace and capture everyone inside! When the real Moss Man appears, Orko learns that the strange creature he aided was in fact Evilseed!