In the playroom, the Princess and the Prince take turns calling over their dog Bona, who can't decide whom to go to first. They're then transported to a fantasy world where they become two comical knights at a grand tournament arena. They undertake various medieval challenges to captivate Princess Bona, from dancing and archery to fencing. The siblings start off in a head-to-head rivalry but end up having so much fun that they forget their competition, joining Bona in a delighted play.