The second in the Heroes of Olympus series, when son of Poseidon, Percy Jackson, awakes from a deep slumber to find two relentless serpentine ladies who refuse to die - who are the least of their problems.
Percy treks off to Camp Half-Blood remembering nothing but the whisper of the name "Annabeth". However, his focus rests with fulfilling the Prophecy of the Seven with fellow demi-gods Hazel and Frank. Should they fail, life as they know it may be destroyed, as will the world.