When Ian Lightfoot comes of age, his mother gives him the magical staff of his late father, which will let him cast a spell to spend one more day with his dad. But the spell goes awry and he has only 24 hours to set it right, so he and his older brother embark on an epic quest, with their mother trailing after, trying to protect them from a dangerous curse.

Set in a seaside town on the Italian Riviera, a young boy experiences an unforgettable summer. Luca shares his amazing adventures with his newfound friend Alberto, but their fun is threatened by a deeply held secret: they're sea monsters from another world just below the water's surface.