After Jessie and Ravi discover that Zuri is a chess prodigy, Jessie enters Zuri into a chess competition where she can win two tickets for a trip to Paris. Meanwhile, while watching a show about unsolved crimes, Luke and Emma start to believe that Bertram is the "Scuba Bandit" and try to prove this – however, Bertram finds out and forces them to be his crime assistants.In the end, Zuri throws the match so that her opponent can go home to Paris to see his family and make amends, and Luke and Emma discover that Bertram isn't really the Scuba Bandit – he was just pretending to get back at them for believing that he was, but when they're watching the show again, they start to believe that Jessie is the Sweetheart Thief as the episode ends.