The Titan's Curse opens with Mrs. Jackson driving Percy, Annabeth, and Thalia to a boarding school. Sounds normal enough, but they aren't really there to attend the place. Actually, Grover, their satyr friend, has found two more half-bloods, Bianca and Nico de Angelo, and the trio is there to make sure they all get to Camp Half-blood safely. Of course, one of the teachers is a manticore in disguise so that complicates matters. A battle ensues while the de Angelo siblings watch in utter confusion. Artemis shows up with her Hunters and suddenly Annabeth is lost, going down over the cliff into the sea with the manticore.