Tiffany Thornton is struggling to compose a song for a new video game device, so she enlists the help of her #1 fan, 12-year-old Darby, to collaborate on the lyrics and use silly props to inspire the creative process. However, Darby's songwriting skills impress the producer and she is asked to write the entire song solo. Meanwhile, Leo Howard's biggest fan, 14-year-old Matt, is surprised to see Leo join him in a martial arts class specializing in a fake form of karate, Floating Swan. When Leo challenges the Sensei on which form is better -- Floating Swan or Kicking Panther -- Matt is recruited by Leo and gets a crash course in Kicking Panther before the battle begins.