The Deep End Demon

Damon is no stranger to trouble. His secret life as a demon hunter has seen to that.
A relaxing summer day at the water park for Damon, Liam, and Madelyn is interrupted when two children go missing. Damon and his friends soon realize this isn't a case for the cops. There is a demon involved. The group heads into the tunnels below the park to investigate. Can they find the pirate-loving kappa in time to save the kids?