Peter Cotton, a scientist that works on rabbits and infertility, learns that the military wishes to use his work to create superhuman soldiers. Cotton is bitten by an experimental mutant rabbit and changes into the evil Rottentail.

In ancient Egypt, Isis and Osiris ruled the land. All were happy for the couple except one, Set, a jealous man who killed Osiris in order to take over his kingdom. Isis snuck into Osiris' tomb and tried to raise him from the dead ...