Mark Prescott promises Patti that he'll never reveal the secret of her hidden cave. It's a great place for pirates, buried treasure, and secret meetings. When a gang Mark wants to join, is looking for a new clubhouse, Mark thinks of the cave. He's positive they would make him a member if he told them about it. But Patti doesn't want to share the cave. And she doesn't want to join the gang. Mark is torn between his friendship with Patti and his new friends.