In order to placate the angry gods, who have allowed Thessaly to be overrun with barbarian invaders and beset with natural disasters, King Jason takes his Argonauts on a search for the fabled Golden Fleece. Meanwhile, back at home, his scheming regent is plotting to get his hands on the kingdom--and the queen.

In a castle, some actors are guests of a duke. It happens that a precious chastity belt, family heritage, disappears by a thief.