无间道长之神剑门

　　811 AD, a family, isolated in their home, deep in the woods a few days travel from Birka. They are poor. The hunting and fishing has been bad for some time, and the father, Joar, takes the desperate measure of going on a Viking raid. Joar does not return for a long time, and the family starts to fear he never will. Runa, the oldest daughter, takes over her fathers chores in his absence. She misses him dearly and nourishes a tender hope that he, once again, will return to them. But in her heart, somehow she knows, that the suffering of the family has just begun. There is something in the air, something in the water, the wind and in the soil. Runa is becoming aware of something vile, something dangerous out in the forest. One day when she is out hunting, she finds a bleeding man, a warrior, almost unconscious. She brings him inside and the family tend to his wounds. As he heals, she realizes he is sent to protect the family from an approaching evil. And he brings news of her father.

　　该片改编自寻找凶宅租住的艺人松原田螺根据真实经历创作的同名小说，龟梨和也饰演没什么名气的艺人山野，他因节目需求被制作人安排去住凶宅，故事就从他住进发生杀人案的凶宅后开始。

　　民国初期，易学传人张天铭、姜大愚和葛小骨，机缘巧合下，分别收到了一封神秘的请帖，与此同时，不学无术的凌伍二，也收到了邀约。
　　随后，四人按请帖指示，相聚在一座豪华庄园。本以为只是寻常的堪舆选址，然而，这一切只是日本秘密间谍宫泽信子阴谋的开始，其目的是利用他们的祖传遗物，找到消失数百年的秘密基地。为了要挟他们，张天铭的未婚妻唐婉晴也被他们暗中抓获。四人只好假意迎合，踏上了这段生死未卜的寻宝探险之旅。
　　历经险阻，终于找到了千年古镇里的秘密基地。众人齐心协力，抵达了最深处的藏宝地。就在凌伍二协助宫泽信子打败众人准备窃取宝物之际。
　　关键时刻，酒窖里再次出现熟悉的二胡声，白发苍苍的老爷子‘闫道海’蹒跚走来。与此同时，无数的暗箭和利器从四面八方向凌伍二和宫泽信子袭来。
　　老爷子给出解药，缓解了唐婉晴的病情，并指出唯一的出口——蕴藏在真正秘密基地里的一扇九宫八卦逃生门。叮嘱他们带上宝物，离开这里。
　　张天铭果断拒绝，表示遵从先祖遗愿让宝藏永远的埋藏在地下。