Azaleah can't wait for her school trip to the zoo, especially when her teacher announces the chance to earn extra reward stickers. But when Azaleah gets home, she quickly realizes earning those stickers won't be as easy as she thought. Azaleah's younger sister Tiana can't find Greenie, her favourite stuffed toy, and she's sure he's been stolen. With Mummy at the restaurant and Daddy at work on a big case, it seems Azaleah is the only one available to track down the stolen toy. Can Azaleah get to the bottom of the mystery in time to earn those stickers?