The Godfather Don Vito Monreale knows, by chance, the Italian-American singer Nick Bouillon. Since the two are alike, Don Vito decided to exploit this similarity in his favour.

The peaceful countryside village of Solmen is savagely assaulted by wild Ungats led by bloodthirsty Magen. In the midst of battle, two baby boys are miraculously saved by a tribe of Amazon warriors known as the Kuniats. The warriors nurture and train the boys for future struggles. The stronger of the two is named , Gunan The Invincible. It is up to Gunan to avenge the annihilation of his people. Gunan stages a spectacular one man war of vengeance against his enemy the Ungats, but they prove to be a formidable enemy, and much bloodshed ensues.

When a heist goes wrong, a safe cracker (Robert Webber) looks for the person who's betrayed him...

Police Commissioner Verrazzano (Luc Merenda) is visited by charming Giulia Medici (Janet Agren) who claims that her brother, banker Valter Medici didn't commit suicide but was murdered. The investigation leads Verrazzano to dark secrets of loan sharks.

A mighty hero battles the son of Satan and his evil witch ally to save a kingdom from being taken over by the duo.

Hit-man Clint Harris has one more job to do before he can retire. The corporation which hires him demands that Harris "erase" an ex-employee who has become a snitch for the police. At first Harris refuses but when his own brother is assassinated he accepts the job.