After a Space Beast throws them off Shuttle Base, the Changeman scramble to get their ship back as Sayaka tries to protect it from the inside.

The Changeman must work with an earthquake institute to prevent Earth from being destroyed in a sea of fire by the Gozma.

An alien assassin, Omega, who makes a living by hunting down Space Sheriffs, arrives on Earth. Adapting a helmet, twin shoulder cannons, and other weapons into his fighting style after losing to Gavan and Sharivan, Omega is now targeting Shaider and challenges him to a fight to the death. Space Sheriff Shaider is the film adaptation of the Metal Heroes series of the same name. This movie takes place between episodes 19 & 20 of the TV show.

The evil Hikita clan rises from the dead to fulfill a curse on the Satomi clan by restoring the face of their warlord by using the skin of Princess Shizu. In the process of trying to capture her, the clan murders her entire family, but Princess Shizu escapes their clutches. She enlists the aid of eight samurai warriors, possessors of powerful magic crystal, led by Dosetsu (Sonny Chiba!) to help rescue the remaining members of her court and revenge her family. Along the way, they must fight undead warriors, evil spirits, poisonous beauties and a giant centipede.