As Roy and Branson take steps to verify Cassian's intel about Sandy's murder, the body of student Charlie Downing is found in a sea lock, and Grace must find out who wanted this young woman dead. As the team investigates the campus, it becomes clear that the university harbours secrets that could be connected to Charlie's death. Grace soon has his sights set on a killer who will stop at nothing to prevent one particular truth from getting out.

As Roy and the team deal with recent distressing events, they are called to the scene of a car accident in which a local hotelier was killed by a driver who fled the scene and left him to die. As Grace tackles what may prove to be one of his most complex cases yet, DC Vee Wilde faces a challenge of her own when she comes face-to-face with her estranged father after many years. Meanwhile, Grace's life takes a devastating turn as his wedding to Cleo draws near.