Blood ties and past lies prove a fatal mix when Pythagoras's brother joins the gang.

A starving Jason makes a fatal error by eating sacrificial meat.

Pasiphae realises she will never be true ruler while ever she and Ariadne both have a claim to the throne, so she offers the queen her freedom – if she will renounce the crown. As wanted men, Jason and Hercules have been forced to seek refuge in the mountains, where Medusa and Pythagoras come up with their own plot, which will take a sacrifice of unimaginable proportions.

The battle between Aeson and Pasiphae for Jason's soul reaches a devastating climax as the warrior is caught by the ruthless queen's soldiers. Jason's friends know they must do all they can to save him before he is lost for ever, and Aeson undertakes a brave and deadly mission into Atlantis to rescue his son. However, he is just one man, and with traitors on all sides plotting to stop him, his chances of success seem slim.