When threats and warnings intermingle with the melodic sounds of ukuleles at the local music school, Leilani and The Hawaiian Island Detective Club members set off to solve another case! Who could be behind the threats? Could it be Leilani's mean math teacher, Mr. Edwards, who also happens to be her mom's new boyfriend? Or, perhaps it's Chad Rivers, Mrs. Lee's former boyfriend. Can Leilani learn to balance the case with her own new-found love? Could there be a third culprit in their midst? One thing is for sure: when it comes to the Hawaiian Island Detective Club, some things aren't what they seem!