Catalina Castaneda is not persnickety, even though that's what her parents and sister, Coco, like to think. Catalina just likes things the way she likes them--perfect.

That's why it's very hard to hide her disappointment when her glamorous Tía Abuela, a famous telenovela actress, gives her an old sewing kit for her eighth birthday. However, Catalina soon discovers the sewing kit isn't as boring as she thinks--it's magic, turning ordinary clothing into magical disguises.

When Tía Abuela's most famous costume has rhinestones stolen from it where it's being displayed at the local library, Catalina gets to work on creating the perfect disfraz (disguise) to track down the thief. But, as Tía Abuela warned her, the magic is only as strong as her stiches, and Catalina doesn't always have the patience for practice...