On a family outing to the famous amusement park, Coney Island, Rebecca sets off with her cousin Ana to enjoy the rides and games. The one thing dampening the fun is her big brother, Victor--if only he would stop being so bossy! Fuming, Rebecca resolves to show Victor that girls can do anything boys can do. When Victor and the other boys laugh at her, she and Ana decide to go off on their own and enjoy the park without their annoying brothers. But now Ana is missing, and Rebecca hears fire alarm bells clanging. If anything has happened to Ana, Rebecca will never forgive herself.