Majestic Movie Studios, at a singing attraction while the Chipmunks will 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 performance after a loony bus ride is driven by Alvin and obtain locked after closing time in the park. Dr. Frankenstein figures that the castle isn't scary enough and recreates the Frankenstein and after the boys are found by the creature, it starts a experience!