Peggy, a former addict, who decides to make a new start after the death of her beloved mother with whom she lived in the small desert town of Yucca Valley, California, makes a life-changing decision to become a private investigator.。罗刚在亚洲区是个声名显赫的私家侦探,在诚意恳求之下接了一个婚外情的小案子,而第三者名为“唐娜”,是个歌星。日本黑社会迫使“唐娜”吸毒后,却被罗刚所救,并爱上了她,帮她戒毒。因为罗刚掌握了日本黑社会的贩毒证据,从而日本人抓住“唐娜”,引罗刚自投罗网。“唐娜”为救罗刚而死,最后罗刚消灭了日本黑社会头目。。影片改编自辽宁鞍山一对夫妇的真实故事,聚焦丈夫照料瘫痪妻子四十余年的漫长历程,以“写情书”为叙事主线,细腻勾勒出逆境之中相濡以沫的坚守爱情。。