After a life changing and magical year at Hogwarts, Nico sadly returns to camp half-blood. Although he misses the school of witchcraft and wizardry dearly, he is happy to see his friends again... especially a certain son of Apollo. But when the time comes for Nico, Will, Viktor and Fleur to meet up for their cruise, the two wizards insist that they pick Nico up at camp. There's only one problem with that plan... Viktor and Fleur still have no idea that Nico isn't really a wizard. Naturally, Nico and his friends at Hogwarts are destined to meet again. But with a war brewing in the wizarding world, and an old enemy of Nico's returning to take revenge, how can our hero possibly remain undercover. And how will he be able to protect Harry, destroy horcruxes and defeat his old enemy without failing? One thing is for certain, this just may be Nico's biggest and most dangerous adventure so far.

Camp half-blood is in chaos. Camp Jupiter just can't think straight anymore. Why? Because the only demigod son of Hades, Nico Di Angelo, is missing. No one knows where he went, why or how but they are determined to find him. The only person who seems to have an idea of his whereabouts is Hades but he has locked up the underworld and refuses to tell our heroes anything. Nico's sister Hazel is frantic and his boyfriend Will is worried out of his mind. But Hades can't throw the rest of the gang into this mess. No, it would be better if his son Nico does this on his own.