Mia is having a truly terrible week. So far she's failed a pop quiz, ruined a batch of cupcakes, and even dropped some icing on her favorite shirt! But her cousins from Puerto Rico are coming to visit, so Mia has something to look forward to--and they even bring her a little lucky charm as a gift!

When Mia's luck immediately turns around, she's convinced that her lucky charm really does have magic powers. But what will she do when her bad luck returns?