A new water park guest brings a thrilling, mysterious challenge to Swedhump Elementary. Dash Candoo, a brilliant inventor, along with his friends Rob and Greta, find their ordinary school day disrupted by the arrival of Ms. Aqualine, owner of the new Aqualina Water Park. What begins as an exciting school outing to the water park quickly transforms into a puzzling mystery when the friends discover sinister activities beneath the surface of the fun. Dash and his companions must use their wits and gadgets to uncover the truth and win the ensuing 'war of the waterslides'.

This installment in the Total Mayhem series continues the established pattern of high-energy adventure and humor that fans have come to expect. The narrative focuses on Dash Candoo's inventive solutions and his friendships, providing a consistent experience for readers familiar with the series. The premise of a water park mystery offers a fresh setting for the characters' escapades, promising a blend of playful action and lighthearted suspense. The book is designed to engage young readers with its fast pace and relatable school setting.