The glass beach house was supposed to be the getaway that Susan needed. Eager for company, she invites her neighbours to join in on a week-long sublet with her and her workaholic husband. On the first evening, liquor loosens inhibitions and lips. The three couples begin picking up on the others' marital tensions and work frustrations. But someone says too much. And the next morning one of the women is dead. Now town detective Gabby Watkins must figure out who permanently silenced her. As she investigates, she learns that everyone there is hiding something that could tie them to the murder.