It took thirteen years, but Gus has finally finished planning he and Shawn's high school reunion. While Gus tries to keep everything in order, Shawn catches up with an old friend, Abigail. Their chat is interrupted when Shawn supposedly sees a person fall to his or her death outside a nearby window. Though there's no body on the ground below, Shawn is insistent about what he saw. He must quickly solve the crime that no one else believes happened before the murderer has a chance to escape.