A story that takes place after The Blood of Olympus, when Leo gets back to camp. Percy invites all the 7 of the prophecy, and some other demigods, to join a game of Truth or Dare.

Hazel Levesque wakes up in a dark room, somewhere in an arena. She doesn't remember anything except her name. She must find and kill all the other demigods that are in the arena as her, or she will be killed and she will never see home again. What will Hazel do?

A king of monsters that was once just a legend has risen once again to assume his power. Will Em and Tommy be able to kill him before it is too late?