When demonic cheerleaders invade his high school, Percy Jackson hurries to Camp Half Blood, from whence he and his demigod friends set out on a quest through the Labyrinth, while the war between the Olympians and the evil Titan lord Kronos draws near.

Relates, in multiple voices, the adventures of a group of youngsters at an electronics-free wellness camp where wealthy, spoiled Jett, leads other campers in trying to stop a criminal.

Hazel stands at a crossroads. She and the remaining crew of the Argo II could return home with the Athena Parthenos statue and try to stop Camp Half-Blood and Camp Jupiter from going to war. Or they could continue their quest to find the House of Hades, where they might be able to open the Doors of Death, rescue their friends Percy and Annabeth from Tartarus and prevent monsters from being reincarnated in the mortal world. Whichever road they decide...

"In response to an awful camp orientation video created by the god Apollo, Percy Jackson and other residents of Camp Half-Blood answer campers' questions such as "What is this place?" and "Do I get to keep the T-shirt?""--

Seven-year-old Bean is too young to go to the camp her sister Nancy is attending, so she and her best friend Ivy decide to create their own camp.

Molly conquers her fear of swimming underwater when she and the other campers at Camp Gowonagin divide into two teams to play Color War.