Majestic Movie Studios, in a singing appeal As the Chipmunks work at the amusement park. Little do they know that the real Dr. Frankenstein come in a fresh attraction called,"Frankenstein's Castle". They overlook their next operation after Alvin pushes a loony bus ride and get locked after closing time in the park. Dr. Frankenstein figures which the castle is not frightening enough and re creates the Frankenstein and after the boys are found by the creature, it starts a wild and wacky experience!