故事讲述了民国年间，林家镇突发怪案，城中众多百姓无端中邪，如同丧尸游魂一般被一股神秘力量控制牵引，在一夜之间消失 不见，城中打更人沈小寒为营救百姓，展开调查，凭借打更人一脉的道术秘法，最终找到并击败了因炼制蛇蛊走火入魔的姜先生，救回了城中百姓，再次守护了林家镇的正义。

雍正年间，湖南秀才曾静因不满清廷统治，上书陕西总督岳钟祺策动反清。事后，雍正就此事大做文章，对案犯严加审讯，广肆株连，由此引出浙江文士吕留良文字狱案。曾静等人鎯铛入狱，后被满门抄斩，吕留良一家也未能幸免。事发当晚吕留良之孙女吕四娘被少林高僧甘凤池于刀剑下救走，甘遂收四娘为徒，授之以飞檐走壁及刀剑武艺。学成后四娘北上京城，与几位义士一起设计潜入乾清宫，击败黑白无常、大内太监总管和两头会武功的巨型黑猩猩，刺杀雍正报仇。

Eun-gi's eventful life in a boarding house has begun with the three ladies: a sexy owner of a boarding house, her daughter who is even sexier, and his innocent first love. Eun-gi, a freshman, has found his new place in a boarding house operated by mother and daughter when he came to Seoul to study. His only pleasure is to play along in the unspoken push-and-pull relationship with the mother or the daughter. One day, his first love, Soon-yi, who is innocent and docile, suddenly comes to visit him at the boarding house. With the sexy daughter of the boarding house behind the door, and the curvaceous lady owner of the boarding house in the bathroom next to his room, the 20-year-old virgin Eun-gi's sleepless night begins.

小说家周时杰（李连杰）被妻子莫尼卡（关之琳）闹离婚，郁闷之下开始编写剧集《冒险王》的剧本，想象中他成了民国时代的冒险王卫亦信，莫妮卡变作日本特务加美子，借此宣泄郁闷。唐三藏当年西天取得、今下落不明的无字真经成为中国及日本政府争抢的目标，为免日本人捷足先登，中国政府邀请考古专家卫亦信及其徒弟阿城（金城武）追查真经下落，得知线索在经盒表面，两人混入日本领事馆，结识身份神秘的美女加美子，后两人又追线索到某日报社，从编辑英叔（罗家英）口中知晓经盒下落，但消息亦被加美子得知。