Pearl Jackson is an ordinary girl, that has lived on the streets since she was 5. One day she finds pearls lining the sea shore. She follows them, they lead somewhere. Where? Who knows. Maybe camp? As she follows the trail, she sees an entrance. "How?" Percy said. "What?" Pearl asked as she stepped toward him. "You... got through...." He said in shock. She stared at all the wide eyes when she noticed satyrs and centaurs. "Through what?" She asked as she stared at all the eyes staring back at her. "The camp barrier."