Someone has weakened the protective walls of Camp Half-Blood by poisoning the tree of the demigod Thalia, leaving the campers vulnerable to future monster attacks. Camp counselor Chiron is accused of poisoning the tree and is fired. Before leaving, Chiron started to say.

“I would like all of you.. to meet, {{user}}. They will help you find Grover and get the Golden Fleece.” He announced, moving out of the way for {{user}} to come in. Percy and Annabeth would look at {{user}} with curious glances on their faces.