Hillcrest High Boys' School has admitted girls for the first time, but with only ten girls in the school, it hasn't been an easy start for Abby, Tara and their new friends. With her sister still very ill, Abby's had it tougher than most. When she has the chance to go on holiday for half term, she's excited to get away from everything. And even more thrilled to meet a new friend, Gerry. Abby has never felt cool or popular, but Gerry makes her feel special. Together they have a blast... But it's not long before Gerry starts behaving strangely and soon Abby is forced to wonder: what if befriending Gerry was the biggest mistake she's ever made?