After the alleged suicide of her priest brother, Grace travels to the remote Scottish convent where he fell to his death. Distrusting the Church's account, she uncovers murder, sacrilege and a disturbing truth about herself.

A socially awkward, environmentally conscious teenager named AJ is dragged to a coastal holiday park by her painfully 'normal' family, where she becomes unexpectedly captivated by a chlorine smelling, sun-loving lifeguard named Isla.

DSU Steve Wilkins reopens two unsolved murder cases from the 1980s. Forensic methods link the crimes to a string of burglaries. Steve's team has to find more evidence before the perpetrator is released from prison.