Izzy is so excited to be staying at a gorgeous Greek villa for the summer holidays - they even have a beautiful pool all to themselves! Then she spots a little puppy hiding in the bushes, who she names Mango. He looks scared and hungry, so Izzy tries to win the puppy's trust by offering him some food.
The more time Izzy spends with Mango, the more she realises how frightened he is of loud noises and grown-ups, and when her dad spots the puppy, he runs away. Izzy knows Mango desperately needs food and shelter -will she be able to find him?