Izzy has just turned five years old. It will soon be time to start school. She had a really wonderful birthday party with her friends. Now, Mum and Dad have brought home a baby brother. Izzy likes her new brother, but she is bored playing on her own. She decides to take her cat, Pudding, for a walk in the new pram, but she has forgotten the rule about being safe.When she gets lost in the city streets, it is Pudding who helps her find her way home. Mum and Dad are really worried. Izzy is very tired. It has been quite an adventure for a little girl.