Aries, ghost of the ram of Golden Fleece fame, remains furious at the loss of his beautiful coat, stolen by Jason and the Argonauts centuries ago. He's desperate to find his beloved fleece, and when he gets a chance to return to Earth, he takes along his best friend Alex, the Underworld zookeeper. They soon discover the Golden Fleece is with the evil immortal sorceress Medea--now a world-famous fashion designer. With the help of Rose, a 12-year-old human girl, Aries and Alex must save the world from Medea's wicked plans--and save Aries from an eternity of being bald.