Jason woke up on a school bus holding the hand of a very beautiful girl. The guy from the front seat called him his best friend... But Jason has a problem: he doesn't remember his friends or himself, as if someone erased his memories with an eraser. After a couple of hours, it turns out that Jason is carrying a magic coin in his pocket, which turns into a sword, that he knows how to fly... and that some incredible creatures, the spirits of the storm, are determined to kill him. Luckily, Jason and his friends had already been flown out by the Half-Blood Camp rescue team. A place specially created to protect and educate people like them - demigods, mortal children and Olympians. Annabeth Chase, daughter of Athena, has to find out how the appearance of new demigods and the mysterious disappearance of her friend Percy Jackson are connected...