Sam, a rebellious princess of the modern kingdom of Illyria, is the second heir to the throne. Just as Sam's indifference to the throne reached a new high in her life, she was surprised to find that she had superpowers and belonged to a secret organization that had been secretly protecting the peace of the country for a long time. The film focuses on Sam's adventure: she joined this top-secret training program, the purpose of which is to train the second children of the royal family to take on the task of saving the world.