Grace investigates a brutal robbery in Brighton where thousands of pounds worth of antiques are stolen. The prime target appears to have been an item of great sentimental value to the homeowner and her brother.

Grace's team locates an unidentified body found in curious circumstances, the post-mortem reveals more questions than answers. As Grace works to identify the victim, another chilling discovery in Brighton suggests something more is at play.

Grace faces his most high-profile case yet when workmen digging up a path by Hove Lagoon unearth a dark secret that was meant to stay buried for good. Meanwhile, an isolated missing persons incident soon becomes an investigation bigger than Grace ever imagined.

When a former offender is found dead, Grace investigates and learns of a US mafia hit. His team must find a woman who fled to Brighton to prevent her from becoming the next victim.