Liv and Will have made it to Yosemite but Liv's plot is thrown off course by the shock arrival of the other woman, Cara, which brings the deceit of the past very much into the present. As Liv and Cara's rivalry intensifies, more revelations emerge and with Liv's marriage hanging by a thread, revenge becomes the only option.

In Vegas, a troubled marriage is locked into a toxic pact. On return to New York, can Liv escape the horrifying consequences of the trip as Detectives Rawlins and Wiseman begin to close in?