When a baby dies at his first birthday party, everyone becomes a suspect. It is a devastating case that makes the detectives examine their own lives, relationships, as well as their profession. Duncan's personal and professional lives collide when Claire is arrested by the Drug Squad.

A family is slaughtered during dinner and their mansion ransacked. The sole survivor is the eldest son and heir - could he be a cold-hearted killer? For Simon, finding answers is complicated by the return of an old adversary.