Though he has come from a rough background on the streets, Muraki quickly rises through the ranks by means of his well-honed blackmailing instincts. Desperate to keep rolling with his freewheeling lifestyle, Muraki sees his luck begin to crumble when he sets his sights on the business partners of a powerful gang boss.
A young man suspects his father's suicide was actually a murder committed by gangsters. Using his expertise in martial arts, he gets himself hired by the gangsters who he suspects are responsible for his father's death.
Set against the background of a giant newspaper company. A girl reporter on the staff of the newspaper witnesses the accidental killing of one of the top executives, whose wife is having an affair with the head of the company.
As Japan is preparing to host the Olympics, a gang member wanting to go to America is sought after by the police after helping his friend conduct a robbery.
The spaceship AAB-Gamma is dispatched from FAFC headquarters in Japan to make a landing on the planet Mars and investigate reports of UFOs in the area. As they near the red planet, they encounter a mysterious UFO that coats the ship's hull with unusual spores. Taking one of the specimens back to earth, it soon develops and grows into a giant chicken-lizard-alien monster that tramples Japan.
At midnight, Yamabe, a killer, escapes from prison. Two years before, bribed by a narcotic smuggler, Yamabe killed a real estate broker. As he was being arrested by detective Negoro, the detective's bullet struck Sakuko, Yamabe's girl friend who attempted to protect him, and crippled her. When Yamabe was sent to prison, Negoro cared for her and they fell in love. Sakuko asked him to marry her, but Negoro was reluctant to take the killer's sweetheart from him. Learning of the relationship of his girl friend and the detective, Yamabe had pledged revenge.
Immigrant gangs terrorize a Japanese town with their threats, loud jazz, and tasteless fashion sense, and only the tough but suave Dr. Amamiya (Ando) can stop them, as long as he gets rid of his silly peace-loving ideals.
