In the modern day, Jason, the protagonist of the show, pilots a one-man submarine to investigate a deep sea disturbance that resulted in the disappearance of his father when he was a child. When he discovers the location, the submarine begins to fail and he is pulled into white light.
He wakes up on the shores of the kingdom Atlantis, which is ruled by a traditionalist, King Minos and his power-hungry, manipulative wife, Queen Pasiphae. Jason has entered a world where gods smite, legendary creatures guard dangerous curses and life is not fair, but it is still possible for heroes and justice to prevail.
Under a set of circumstances, he is given shelter by a couple of unlucky and largely unemployed locals; Pythagoras—a young intellectual who enjoys beautiful triangles—and the rotund, ex-prize fighter Hercules—a hopeless romantic who spends most of his time in taverns drinking and gambling.
The three of them encounter monsters, gods and demigods, as they live the Greek myths and battle to do good and protect the innocent. Along the way, they pick up some allies including Medusa, a palace maid, Ariadne, daughter of the King and heir to the throne, and a mysterious Oracle, who seems unsurprised at Jason’s arrival. The Oracle predicts a world-changing destiny is in store for Jason if he stays on the right path.