Kawasaki is a master carpenter who has a consummate skill. He looks scary but he is full of human warmth and has a weakness for women. Living with his wife and a daughter happily and as usual, he works hard, the sales woman of an insurance company passes by his work place . In fact, she is a single mother who has a son “Ryusei” who doesn’t know his real father . Kawasaki is concerned about him and thinks of building a house for them, however, his wife, daughter and his apprentice are not satisfied with his behavior. He can’t read the line around him.
While he devotes himself to build a house, the father of Ryusei appears in front of Kawasaki.
As the film portrays his care for the shy boy, the story reveals the truth about the daughter not being his biological daughter and the emotional challenge between him and his apprentice. There are some dramas with the man's family.

川崎慎吾（長渕）は神技的な腕を持つ大工の棟梁。強面風で、やんちゃな人情味厚い男だが、好みの女性には少々弱い。妻・美沙希（飯島）と娘の柑奈（山口）と幸せに暮らし、いつものように仕事に励んでいるところに保険会社の営業ウーマン・池田芽衣（広末）が通りかかる。実は彼女は、龍生（潤浩）という息子がいるシングルマザーで、父親を知らない彼を気にかける。この親子に家を作ろうと思い立つが、そんな慎吾の様子に納得がいかない、娘と妻と一番弟子の高史（瑛太）。周りの空気も気にせず、家づくりに没頭する中、龍生の父親と名乗る男が慎吾の 前に姿を現す。