Hiding in the library from her mischievous classmates, Lisa discovers "The Superhero Handbook" and learns how to develop superpowers. She begins training, learning to fly and talk to animals, helping those in need, and earns the nickname Red Mask. Meanwhile, villains are plotting to plunge the city into eternal darkness. Lisa must assemble a team of like-minded people to fight evil, save the city, and prove that anyone can be a superhero.