Everyone feels worried sometimes. But what if your worries came to life and started following you around? Jazmin's mum is about to have a baby and Jaz is SO excited! She's been waiting forever to be a big sister and knows she's going to be brilliant at it. Okay, it might mean some changes to their family, but Jaz is sure everything will be just fine. So imagine her surprise when a host of furry, fretful friends arrive to cause some serious mischief. That's right, it's the Worries - gloomy Loner, nervous Change, pushy Jealousy and DJ Disaster, always waiting for something to go wrong. Jaz tries her best to keep her worries to herself, but with her birthday party coming up fast, they seem set on turning her into the Worst Sister EVER!