Xena is summoned to the Underworld by the ghost of her beloved Marcus to help defeat the madman Atyminius, who has stolen Hades' Helmet of Invisibility. One night, the ghost of Marcus appears to Xena to ask for her help. He tells her that the Underworld has been thrown into total chaos and that good souls are in danger. Xena follows his instructions and dives deep into the Alcyonian Lake to gain entrance to the Other Side. When she arrives on the shores of the River Styx, Charon confirms that the wicked now have the run of Elysian Fields, while the innocent are suffering in Tartarus. He ferries her across the river where she rejoins Marcus and witnesses the evil that has overrun Paradise. Questioning Marcus, Xena realizes that he was put among the wicked when he died. She is, therefore, quite moved by the selflessness of his request for help in restoring order in the Underworld.