The statue of the demon god Gora, a hidden treasure sought by many evil people , has the power to spit out diamonds when it hears the cries of a child . After obtaining the statue, Dr. Q tries to bully the children into crying in order to obtain military funds to conquer the world. Pegasus, the guardian god of the galaxy, gives the Mizuno brothers supernatural powers and super machines, and asks them to transform into Bikecrosser and protect the children from Doctor Q's evil clutches.