A young mother kills in a fit of unexplainable rage a seemingly stranger. An inquisitive detective obsesses over the case, attempting to get to the bottom of the true motive behind the act.
Ambrose unearths a startling secret about Cora that changes the course of the investigation; Mason takes matters into his own hands.
Cora tries to block Ambrose's continuing investigation, while Mason struggles to come to terms with secrets from Cora's past.
An unassuming housewife stabs a beachgoer to death, which sparks an investigation and creates confusion in a small town.