Twelve-year-old Aru stretches the truth to fit in at her private school, but when she is dared to prove an ancient lamp is cursed, she inadvertently frees an ancient demon.
When she incurs Neptune's wrath by finding a diamond ring buried under rocks in the ocean, Emily is put under a curse that will force her to choose to be either a mermaid or a human and split up her parents forever.
When a glowing lost and found box appears and stranger-than-normal things begin to happen at Strangeville School, it is up to Harvey and his friends to solve the mystery of a fifty-year-old curse before it is too late.