Melanie Cooper has zero interest in catering her fifteen-year high school reunion, but Angie insists it's only right that they bask in the success of Fairy Tale Cupcakes-and Mel's engagement to the delicious Joe DeLaura is the cherry on top! Everything is going better than expected until Mel's high school nemesis picks a fight. No longer willing to put up with Cassidy Havers's bullying, Mel is ready to tell the former homecoming queen to shut her piehole and call it a night. But as Mel and Joe prepare to depart, Cassidy is found dead in the girls' bathroom next to a note on the wall that points right to Mel-making her the prime suspect. Now Mel must follow the clues to find the real killer and keep her reputation from being frosted for a crime she didn't commit.