马季（马国明 饰）多次与死亡擦身而过，一次意外唤醒了沉睡百年的石精灵石敢当，从此打开了天眼，看到凡人看不见的「东西」。一次在石敢当（胡鸿钧 饰）决战邪魔之际，马季意外吸走石敢当的灵力，从此马季成为降魔大师。 的士司机马季为人豁达乐天，有次人有三急在草丛小解，意外唤醒「石精灵」石敢当，从此能够看见灵魂。后来，马季认识了灵异节目主持贝贝娜，一同展开寻妖降魔之旅。贝娜渐对马季生情，然而马季原来一直暗恋医生乘客庄芝若。其时，邪魔为祸世界，石敢当与之决战时，竟法力全失，此时马季居然爆发出惊人灵力。
他们在一次意外事件中相识，本以为只是彼此生命中的过客，却在不断逼近的危险与真相中，被迫站到同一阵线。当爱与责任、真相与救赎交织，他们必须在“刀刃之上”寻找各自的答案。
一封突如其来的简讯，将阔别多年的八位好友齐聚山中民宿，预备一同挖出学生时代埋下的时空胶囊，没想却让一桩昔日丑闻意外出土，使心结与宿怨逐渐淹没了理智。第一具尸体的出现，象征纯洁的友谊就此告终；第二具尸体的出现，宣告杀人游戏正式启动。风雨阻断逃生去路，死亡数目逐渐升高。在人人自危的时刻，不愿扣下扳机的那个人，也许就是下一具尸体......
Popular BBC comedy series set in the fictional south coast seaside town of Walmington-On-Sea during World War 2. Alternating moments of gentle character comedy with broad slapstick, it recounts the misadventures of the local voluntary defence force (or 'Home Guard') consisting of men too old or 'unfit' for military service. They are led by the pompous Mainwaring, manager of the local bank, and consist of the suave, mild-mannered Sergeant Wilson , Lance-Corporal Jones, the town's butcher and an old soldier prone to hysteria, cockney spiv Walker, dour Scots undertaker Frazer, gentle, elderly and incontinent Godfrey and dim-witted mummy's boy, Pike, whose mother is 'friendly' with Wilson. They are based in the Church hall where there is much friction between Mainwaring, the effeminate Vicar, his creeping Verger and ARP Warden Hodges (the grocer) who calls Mainwaring 'Napoleon' and strongly dislikes him. The 80 episodes (the last 68 made in colour) have been frequently repeated, many are available on video and there was a 1971 Cinema version. A British institution, familiar to most people throughout the country.
