人气作家长内美春(寺岛忍饰)以演讲旅行为契机,与代表战后派的作家白木笃郎(丰川悦司饰)形成男女关系。另一方面,白木的妻子笙子(广末凉子饰)默认了丈夫和女性的关系,作为夫妇维持着平稳的生活。但是,对于实春来说,白木并不仅仅是肉体关系,通过写作加深了联系,成为了无可替代的存在。虽然白木在两人之间来来往往,但与女性的交往却无法停止。通过白木互相回响的二人将走向何方?。This feature documentary intends to spread the word about Paleo (aka the Caveman diet) and raise public awareness about this healthy alternative to the Standard American/Western Diet (SAD). The film presents the basic tenets of the Paleo movement through the eyes of various characters who have adopted the lifestyle.。