For the past thirty years Rucker the trucker has devoted his life to travelling the road as a mass serial killer. When Rucker picks up unsuspecting Maggie (Cheyenna Lee), she makes him the subject of her trucker documentary.
　　However, her life takes a dangerous detour when Rucker recruits her to complete his masterpiece: A connect-the-dots roadmap portrait of his ex-wife comprised of the women he’s killed who resemble her…

故事发生在苏格兰，讲述普普通通的Gabe（伊恩·德·卡斯泰克 饰），是格拉斯哥「斯特拉斯克莱德救护车服务」的紧急呼叫处理员。当Gabe接到一位似乎认识他的虚弱女子打来的求救电话后，他的世界被彻底颠覆了。Gabe在顶着压力确定她是谁的同时，作出了一个可能具毁灭性后果的决定。