A theatrical film based on the Nickelodeon Show 'Henry Danger.'

A coastal town known for its legend of once being home to mermaids is turned upside down when a mysterious girl appears and begins wreaking havoc.

When a magical butterfly kisses the kind princess, Kara, the crime-fighting hero, Super Sparkle, emerges. Now, along with her strong cousin, they must deal with the Baron, the kingdom's real enemy. Will the super-girls teach him a lesson?