位于宇都宫的一户人家,居住著一位历经明治、大正、昭和以及平成四个时代的耄耋老人——柴田丰婆婆(八千草薰饰)。丰婆婆的丈夫贞吉(铃木瑞穗饰)早年过世,她一人独居,虽然会感到寂寞,不过每天细心打理这栋充满回忆的老宅依然会为婆婆带来充满温暖怡人的快乐。只是丰婆婆心中仍有所挂念,那就是她的独生子健一(武田铁矢饰)。健一人很善良,可就是脾气急躁,都六十岁的人了工作始终没有长性,经常打著找工作的旗号跑去单车竞技赛场小赌一番,衣食起居全靠和善的妻子静子(伊藤兰饰)一人操持。 2006年的一天晚上,丰婆婆不小心从床上滑下来,在地板上睡了一夜。事后在诊疗所监察室,上条医生(上地雄辅饰)发现婆婆的眼睛有所异常。静子分外担心,请求婆婆和他们住到一起,但被婆婆微笑地拒绝了。之后不久,丰婆婆接受青光眼手术,而手术当天健一的身影却并未在医院出现。当晚在与妻子的争执中...。Bipedalism, or 'two-footed walking', is the story of a painter who grew up in an orphanage and only years later learns the circumstances of his father's disappearance and death. Childhood memories bring the main character back to the past: he buys a house in the suburbs that used to belong to his family. In the basement, he finds his father's archives and scientific research documents on the hybridization of human race with related biological species. Studying the archive material, he unexpectedly finds evidence of efforts to renew the experiments on the remaining hybrid population. The painter then becomes a researcher, and consequently a victim. The basic idea of his father's research was to change, control and influence the process of human evolution - initially connected with eugenics theories of the period before World War II, and now being placed in a context of modern 'biotechnological' expectations by his former colleagues. The main character tries to recreate and realize his father's heritage, who was forced to cooperate with state terror organizations, using the results of his secret research. In a tragic manner, this information turns into the main character's reality, at first forcing him to reappraise his father's values and later driving him to madness.
(http://www.input2002.com/en/film/24418.html)。