根据东野圭吾畅销悬疑小说《长长的回廊》改编。回廊亭大宅中暗藏无数秘密，绝望女人为爱复仇的欲望纷争正在上演！富商病逝，他的亲属们聚集在回廊亭等待数十亿遗产将会如何分配，众人各怀鬼胎。关键时刻，律师周扬带着遗嘱和一本神秘日记而来，更牵扯出一场发生在一年前的火灾凶杀案，死者是富商流落在外的私生子，更是全部遗产的第一顺位继承人！ 凶手似乎就隐藏在众人之中……

The film is based on the best-selling suspense novel "The Long Corridor" by Keigo Higashino. There are countless secrets hidden in the cloister pavilion mansion. After the rich merchant died of illness, a fire murder case that occurred a year ago was revealed, involving the first heir of the estate, that is, the illegitimate son of the deceased, making the distribution of the estate complicated.