It's the day of the great animal contest, and Mango's magical vest stopped working! Oh no! When Mango wakes up one morning, he remembers that the great animal contest is set for today, only he totally forgot to prepare for it! How amazing it would be to win that prize... But Mango is just a cat, and each of the other animals are clever, faster, and stronger than him. Even with the help of Iron Cat's comforting words and magical vest, he really doesn't think he can do it. Help Mango the cat find his confidence and learn that hard work can beat any self-doubt!