Emily Sparkes thinks having your best friend move to Wales at the same time as your parents decide to have a new baby is probably more trauma than an eleven-year-old should have to cope with. Then she finds she has a whole lot more to worry about when her teacher chooses her to partner revolting Gross-Out Gavin the school trip. Emily is determined to get a different partner and when glamorous new girl Chloe Clarke turns up it seems her prayers might be answered. Unfortunately, everyone has gone Chloe Clarke mad, and Emily finds her 'sworn enemy' Zuzanna has the same idea. Getting and keeping Chloe as a friend proves a lot more troublesome than Emily anticipated and leads her into a whole new set of disasters ...