 Hannah wins a school debating contest for which the prize is four tickets to the circus. Hannah invites her mother Nancy, brother Billy and friend Pete. As they sit down to dinner Hannah discovers that she had left the tickets back at the lodge. Billy and Hannah boat back to the lodge to retrieve them. Billy waits for Hannah at the dock and when she doesn t return after a long time, goes inside to investigate. He can t find her anywhere. Billy calls in the strange disappearance to Nancy back at the restaurant. Nancy and Pete borrow a motor launch and race back to the lodge to find out what happened to Hannah.