Eve is a bored, whip-smart, pay-grade MI5 security officer whose desk-bound job doesn't fulfill her fantasies of being a spy. Villanelle is a mercurial, talented killer who clings to the luxuries her violent job affords her. Everything changes when they cross paths.

准新郎Johnners的伴郎Ledge组织了婚前单身派对，邀请几个密友周末到苏格兰高地的森林进行猎鹿冒险活动，新郎的大舅子Ian也受邀前来。然而，猎鹿还没开始，他们就成了猎物。密友一个接一个神秘死去，他们亲密无间的友谊逐渐土崩瓦解。在这片与世隔绝的黑暗森林中，为了生存下去，他们各自的肮脏秘密慢慢暴露出来，面具之下真正的本性开始显露，这个周末注定是一场堕入地狱的噩梦……