In the middle of a sort of search and destroy game at Camp Half-Blood after fleeing from the orientation at Percy’s new high school when Percy and a monster are fighting and blows up a part of the school, Percy and Annabeth who are on a team, fall into a pit that they soon discover to be an entrance to the Labyrinth.
After a council is held, and Annabeth goes to see the oracle, she chooses Percy, Tyson, and Grover to set out on a quest through the Labyrinth to find Daedalus’s workshop and retrieve a magical item that allows you to navigate through the ever changing maze before Luke does. Because if Luke retrieves the string first, He will be able to find the entrance to Camp half-blood, and not have to worry about the magical boundaries around the demigod camp.
In the Labyrinth, Hera, saves the four of them from a premature decision conducted by the two-headed man called Janus. Hera talks of her partner, Hephaestus, and for the kids to go to him.
When the kids get to Hephaestus, he tells them to go to Mount St. Helens, and when they get there, the kids are forced to split up, and by a happy surprise, Annabeth kisses, Percy.
After fighting and fighting, Percy is thrown into the air and that somehow ends him up on an island with calypso for a companion. After a long period of time Percy is offered to go back to Camp Half-Blood, as well as stay with her. Percy loves her but he can not stay. So Percy goes back to Camp Half-Blood, not to find Grover or Tyson.
So Annabeth and Percy and Annabeth must go back into the maze, but Percy has an idea. His mortal friend can see through the mist, she can see monsters demigods, everything. So they can use her for navigation through the Labyrinth. With no problem at all the convince her to go into the Labyrinth, find an entrance, descend, and beginning their search a gain for Daedalus’s workshop. With no trouble at all, they navigate through the maze to a door, the door to Daedalus’s workshop. The open the door and find a room filled with, laptops easels, invention, blueprints and all sorts of other architectural designing tools and ideas.
They find out quick that Daedalus is an old not a friend not an enemy person from Camp Half-Blood. The kids must leave quick because monsters and Kronos’s army is at the door to kidnap and kill Daedalus. They must also take an old friend, Nico, son of Hades with them.
Once they get out of the destroyed and burning Daedalus’s workshop, they get a ride and find another entrance to the Labyrinth. Now, they need to find Grover and Tyson. In a short time, they find Tyson holding the unconscious Grover at the entrance to the Great Lost God Pan’s cave.
The Great God Pan speaks prophesies of the future for all who are around him, except Nico.Grover must return to Camp Half-Blood and tell the Council of Cloven Elders that the Great God Pan is dead.
After a difficult Council of convincing them of the death of the Great God Pan, Everyone lines up around the entrance to the Labyrinth, because Kronos is now back in is full form and is probably sending part of his army to invade Camp Half-Blood. Every Half-Blood in the Camp knows that they are in for the battle of a lifetime!
The Army of Kronos bursts through the Labyrinth, and the fight begins. Afters hours of fight, Grover is possessed by the God Pan for a few seconds, long enough to drive the Army of the Titan Lords Army back into the Labyrinth, to retreat. After that, Nico talks to Percy and says that he does not belong here, anywhere, and with that, Nico descended into the forest and disappears.
Chiron with a broken leg, decides to tell Percy to go home too his mother. And when he gets there, Percy’s 15th birthday party i going on. Percy’s Mom is going to get married to Paul Blofis and Poseidon comes to visit Percy freaking out his mother and unsettles Paul.
Percy and Poseidon talk about stuff he came to his birthday part, it means the world to him! After Poseidon leaves, Percy goes to his room to think things over. When he gets there, he finds Nico out on the fire escape, who found out a way to beat Luke and the evil Titan Lord.
Percy invites him in, They have a lot to talk about.