阿邦、阿江、阿南和Kenny是共患难的好兄弟，一次联袂往泰国旅行，在偶然的机会下，阿邦无意帮助了降头师乃蜜把另一降头师击退，乃蜜并邀请四人回家过宿，而其妹水抹对阿邦情大独钟，要乃蜜对邦下爱情降，谁料竟下错于其余三人身上，弄得水抹羞愤而死，恶梦便从此开始……A group of friends went on a hedonistic trip to Thailand. Accidentally, they rape and kill a sorcerer's sister. Now, upon arriving back home to Hong Kong, they find themselves cursed by the sorcerer.
