Diego and Sage’s romantic weekend ends before it even begins. At their chic accommodation, another couple is already there. Will and Cin seem friendly enough, so they decide to stay — but that turns out to be a deadly mistake. Mercedes Bryce Morgan’s ice-cold shocker expertly blends the spirit of the classic femme fatale thriller à la SINGLE WHITE FEMALE with the brazen sociopathy of BARBARIAN. Psycho-horror at its most ruthless.