Rhiannon is your average girl next door, settled with her boyfriend and little dog - but she's got a killer secret. Although her childhood was haunted by a famous crime, Rhinannon's life is normal now, if not glamorous. By day her job as an editorial assistant is demeaning and unsatisfying. By evening she dutifully listens to her friend's plans for marriage and babies whilst secretly making a list. A kill list. From the man on the Lidl checkout who always mishandles her apples, to the driver who cuts her off on her way to work, to the people who made her who she is, Rhiannon's ready to get her revenge. Because the girl everyone overlooks might just be able to get away with murder.