When Jason goes in search of his father he finds himself washed up on the shores of a mysterious land - a world of mythical creatures, soothsaying oracles and palaces so vast it is said they were built by giants: this is the city of Atlantis.
But it seems the newcomer has chosen the wrong time to arrive in the fabled realm and Jason soon finds himself at the mercy of a deadly ritual, from which there can be no escape.
Despite their newfound fame after slaying the Minotaur, the boys are still penniless and hungry. When an old man asks them to find his missing daughter, things seem on the up, but it soon becomes clear that their task will not be an easy one; she has been taken by the Maenads, fanatical worshippers of the god Dionysus. With the hopes and life of the old man fading, it is a race against time that Jason cannot turn his back on. But just when their perilous task seems at an end, he comes face-to-face with a stranger named Medusa.
Jason's actions end up having some serious consequences for the the group of friends as they are forced to compete in the sport of bull-leaping. To survive they must jump the charging animal.
The boys discover an abandoned baby whilst out hunting in the mountains. Jason refuses to leave the child to die and decides to take the child back to Atlantis. His charitable act ends up having some far-reaching implications as the group of friends find themselves involved in a complicated web of secrets and lies.
After receiving a night-time message from outside the city, Ariadne calls on Jason and his friends to help her to find the sender. But leaving the city without raising the Queen's suspicions seems impossible - especially when they find out that the message was written by Therus, Ariadne's exiled brother. As Heptarian and the King's guards get closer to finding him, Ariadne must decide if her loyalties lie in Atlantis or with her royal sibling. .
Desperate to win over Medusa's heart, Hercules pays a visit to a powerful witch, Circe. But events take a malevolent turn when Hercules realises he has unleashed a potent but toxic enchantment that threatens to turn his burgeoning hope into unbearable grief. With a bitter chain of events rapidly unfolding, it is up to Jason to undo history before it is too late. As he re-traces Hercules's steps into the mountains he is unaware that a deadly trap has been set for him; one with far-reaching consequences beyond the fate of just his friends.
When Jason learns of Ariadne's betrothal to Heptarian, he is brokenhearted. With nothing to lose and everything to gain, he enters into a brutal fighting tournament to honour the nuptials - lining up with a bevy of terrifying contestants including the undefeated Heptarian. Determined to beat the husband-to-be and show his worthiness, it is up to Jason's loyal friends to guide him through the contest, where there are more than just broken hearts at stake.
The boys gain an unexpected addition to their workforce with the arrival of Pythagoras's feisty younger brother, Arcas. Charged with escorting a valuable cargo across the desert, the gang travels into the unknown with a ramshackle caravan of strangers.
It is not long before their journey takes a decidedly spooky turn; after spending a night in a temple dedicated to the Furies, it soon becomes clear that one amongst their number has something to hide. As danger closes in and a dark secret is exposed, our heroes are forced to confront some uncomfortable truths as they fight for their lives under the desert sun.
Romance is at last in the air for Hercules and Medusa until she is kidnapped by a cruel moneylender, Kyros. In exchange for her life Kyros demands that Hercules retrieves a precious and powerful artifact from the Underworld - a task which can only mean certain death. With only one day to fulfill the ransom, its a race against time for Hercules and his loyal friends. Will they find another way to descend to Hades and return with the artifact, or be forced to walk among the dead forever? Whatever the outcome, the gods have spoken and someone, somewhere is about to pay a terrible price.
After the tragic events surrounding Medusa's disappearance, the boys pay a visit to the inventor Daedalus whose genius offers hope of a cure. But, unwilling to wait for answers, Hercules acts on information from the unscrupulous Crios and sets off in search of his lost love. His decision soon sees the boys literally running for their lives as they become the prey in a brutal manhunt. With hopes of an escape fading fast, their courage is tested to its limit, until a lifeline comes from an unexpected source.
Penniless and starving, Jason cannot believe his luck when he stumbles across an abandoned feast. Temptation proves too much and he helps himself to the bounty, savouring his first proper meal in days but it soon becomes clear that Jason's gluttony has come at a price as he begins to exhibit some seriously strange behaviour. As things spiral out of control, it falls to Hercules and Pythagoras to save their friend before Heptarian and the palace guards bring his exertions to heel for good.
Jason ends up being reminded of his promise to Circe and her grim warning should he fail to honour their pact. He is instructed that he must hug the Queen.
Minos' health continues to fade as Pasiphae's scheming reaches its zenith. She sentences Ariadne to a gruesome execution not even the worst of enemies would deserve. Now that the court's loyalty is with the Queen, Jason is Ariadne's last hope. He'll need all the help he can get if he and his friends are to save her life, but fortunately there are a few in Atlantis who remain loyal to the King. The battle lines are drawn in Atlantis once and for all but just as the odds seem stacked against Jason, a shocking revelation is made that exposes the past and changes the course of the future forever.