As Jason is due for execution in two days unhappy high priest Melas protests to Pasiphae, who has his adopted daughter Cassandra as her hostage to make him betray Jason. Hercules tries to free Jason but is himself caught and imprisoned with him though Ariadne and her loyal advisor Delmos arrange for their escape, which leads to their own arrest by the traitor Cilix. Pasiphae now prepares to declare herself the ruler of Atlantis and a reluctant Hercules prevails upon Medusa to tell the truth and save them all.
