Don Salvatore Savastano, a boss involved in the smuggling of contraband cigarettes, is forced to watch four masked robbers kill his wife and his only son in a restaurant where he and his family are celebrating the young boy's first Holy Communion. From that moment on Don Salvatore has no other purpose in life but to get his revenge on the four assassins.

An alien vessel manages to break the earth defense systems. Captain Layton is sent to investigate and find the invaders. Together with friends from the planet Ganymed he discovers the enemies in a hidden underground city on earth.