A classmate's money for buying books was gone. Was there a thief in the class?! Just when the classmates were suspicious of each other, Hin, who was usually unremarkable, wanted to say something, but no one cared to listen. While Hin didn't know what to do and opened the door of the classroom to seek help, he accidentally came to the "Land of the Moonset" in the legend. The Magic Bunnies and the Big Cat were heading to the Windmill Island Market, but they were greeted by the "bomb ambush" of "Moonlight Strangers", so Hin and everyone embarked on the road to defuse the bomb. During the journey, Hin gradually changed what he had thought before, which led him to find out the thief who took the money for books, and unintentionally to untie his own knot.