In the British countryside, the Harver family head out on an idyllic summer camping trip where they can bury past tensions and enjoy some family bonding. But when their camp is sabotaged by an unseen intruder in the night, they head to the nearby creepy old farm desperate for help, where vengeful farmer Hunt Hansen and…

本剧改编自阿加莎·克里斯蒂同名小说《峭壁上的谋杀》。　　故事报告当地牧师的儿子Bobby Jones和他工致的社交名媛同伙Frances “Frankie” Derwent发了然一个奄奄一息的汉子，临死前嘟囔着“他们怎么不往找Evans”，两人由此踏上了破案之路。带着从汉子口袋里找到的年轻女子照片，两名专业侦察跟跟着谜团背后的答案，也被谜团所追赶。