Maddy has always wanted a cat, but now she's got something even better - three small ceramic cats which come to life and give her magical powers!

When Maddy discovers that another one of the cats has come to life, she can't wait to get to know her and start using her new magical power. But Nibs doesn't seem very friendly, and she's here for a reason - there's a problem to be solved.

It doesn't take long for Maddy and Nibs to figure out who needs their help. Maddy's cousin is having trouble settling into her new school. She's so miserable that she's decided to run away. Can Maddy and Nibs use their Shadow Magic to stop her?