Fuuma from the strange realm led by their Emperor Kubilai began it's galactic conquest, Commander Qom of the Galactic Police immediately deputizes all trainees as Space Sheriffs to fight against the impending threat. Cadet Sawamura Dai is deployed to his home, Earth and given the code name Shaider. Aiding him is Female Space Sheriff Annie who vowed vengeance against Fuuma for destroying her home world.

Fuuma uses the Shigi (Strange) Song to make animals ferocious and having children give up their beloved pets, causing them great anguish. Shaider & Annie steps in to stop the evil plans of Fuuma.

High Priest Poe uses the hypnotic effects of the Strange flowers on Annie, making her believe that her family is alive and Shaider has hurt them.

A strange beast disguised as a witch, grants magic to children to make them transform into animals, in reality they are replaced by Fuuma's creatures. The children are kidnapped and given chromosomes that will transform them into Fuuma's beasts permanently.

To stop the development of society, Fuuma establish the church of MujiMuji, it's doctrines turned hard working people into sloths Youko a friend of Dai was kidnapped and forced into the cult's teaching.

After eating the strange cuisine's food, a bullied young kind boy developed telekinetic powers. He uses this power to get back on all those who made fun of him, becoming vengeful and arrogant. Shaider investigates the sudden change of the boy's attitude.