That night, Hook finds Jane and promises her that he "wouldn't harm a single hair on [Peter's] head" if she helps him find treasure that Peter and the Lost Boys stole. Hook gives Jane a whistle to signal him when she finds it, and leaves. Jane asks Peter and the boys to play a game of "treasure hunt", and they teach Jane how to act like a Lost Boy, hoping to get her to believe in fairies and save Tinker Bell. Jane finds the treasure and changes her mind, discarding the whistle. The boys make her a "Lost Girl", before Tootles finds and blows the whistle, inadvertently alerting the pirates, who capture the boys and expose Jane as their accomplice. Jane tries to convince Peter that it was a misunderstanding, but Peter accuses her of treason and reveals that her disbelief in fairies is causing Tinker Bell's light to go out.