Now that he's had some time to adjust to the news that he's the son of the sea god Poseidon, Percy Jackson's comfortable being a half-blood. In fact, seventh grade is coming to an end, and nothing too out of the ordinary has happened. That is until mythological monsters assault Percy's gym class.

Soon things get even more dangerous. Camp Half-Blood—the only safe haven for demigods—comes under attack. The activity director is being forced out and the borders protecting the camp are being poisoned. Percy learns that to save the camp, he and his friends must journey to the Bermuda Triangle. Will they survive? Will they run into Percy's dad?

Go along for the ride as Percy and his friends dive deep into the Bermuda Triangle, face creatures that they thought only existed in stories, and get their hands on the legendary Golden Fleece.