In this book, Percy Jackson is the main character and he later realizes that his father is actually Poseidon, which makes him a half-blood. Being a half-blood comes with lots of trouble because he is now more prone to monster attacks, so he must train at Camp Half-Blood where many other half-bloods go to train and to master their skills. However, a conflict arises amongst the gods and Zeus' lightning bolt gets stolen. This incident is blamed on Poseidon because there was already a pre-existing feud between the two. Percy Jackson must go on a quest in order to prevent a war to break out amongst the Gods and to prove that it is not Poseidon who Zeus should blame. Percy Jackson realizes that it was actually one of his friends, Luke, who stole the lightning bolt because he wanted a war to break out amongst the gods since he thought that the Gods had been in power for too long. Percy ends up battling them and he was able to attain the lightning bolt on time. Poseidon talks to Percy Jackson and he calls Percy, "the true son of Poseidon." Back at camp, Luke ends up telling Percy that he is working for Kronos, a Titan, but Luke decided to let a scorpion sting Percy, with intentions to kill him. However, Percy manages to survive.