Another hilarious picture book starring everyone's favourite Unicorn Expert, Sophie Johnson! Sophie Johnson studied very hard to become a detective and it's a good thing she did - there has been a terrible crime! Someone has stolen Lion's tail. Unfortunately, this means that Sophie doesn't have time to train her new (and not very good) assistant, Bella. However, is it possible that, while Sophie is busy rounding up suspects, she doesn't see that Bella may be better than she thinks?.