During a field trip to a display of Greek and Roman art, teenager Percy Jackson (Logan Lerman), is lured away from the crowd by a Fury disguised as his substitute English teacher, who then attacks him, questioning him about the lightning bolt. Percy, who has no knowledge of this, is rescued by his Latin teacher, Mr. Brunner (Pierce Brosnan). After getting rid of the Fury, Brunner gives Percy a magical pen. On Brunner's instruction, Percy's best friend, Grover (Brandon T. Jackson), takes Percy to a training camp for demigods (half-human, half-gods), Camp Half-Blood. They are driven by Percy's mother, Sally Jackson (Catherine Keener). During their trip to the camp, Percy tries to learn about his father from Sally, but they are attacked by a Minotaur. Percy and Grover, who is revealed to be a satyr (half-goat, half-human), make it to the camp. Its defenses keep Sally from entering, she is captured by the Minotaur, and disappears before Percy. Percy engages the Minotaur with the magical pen, which turns into a sword named Riptide. He finally kills the creature with one of its horns.