影片讲述生活在城市底层的男人们之间可悲又可笑的友情故事：山田孝之饰演的是一个身处艰辛世道却仍宁折不弯、一见到酒馆里大吵大嚷的年轻人就会发脾气的男人权藤右近。唯一与右近能相处得来的，是做着掘金工作、善良老实的牛山（荒川良良饰）。而右近的弟弟——身为商务精英的左近（佐藤健饰）则对两人虽收入甚微却自由自在的生活深感羡慕。 一天，右近和牛山在住所旁边的废弃场捡到一个旧机器人。左近研究发现这个机器人可能是凌驾于现代科学的高科技产品，于是三人开始尝试利用机器人的性能进行掘金……

A postman learns that he doesn't have much time left to live due to a terminal illness. A devil then appears in front of him and offers to extend his life if he picks something in the world that will disappear. The man thinks about his relationships with ex-friends, ex-lovers, relatives and colleagues who will be sincerely sad when he dies.

Koichi and Atsumi are lovers who have known each other all their lives. A year ago, however, a suicide attempt by Atsumi left her in a coma. Through 'sensing', a type of neurosurgical procedure allowing contact with the intentional aspect of a comatose patient's mind, Koishi tries to find out why Atsumi tried to kill herself, and to bring her back to consciousness. He enters her subconscious, and is told to find a picture of a plesiosaur she drew when she was a child. It turns out that a childhood incident buried in their past will bring their minds together.