因為日本男孩 岡村修治的母親希望在過世後，能將骨灰埋葬在台灣，《寧靜夏日》故事隨著岡村來到台灣的旅程展開。旅途中，岡村結識了菲律賓外勞和來自中國東北的中文老師，並發現母親過去隱藏的一段家族悲劇，他試著打電話給在日本的父親，希望藉此了解自己記憶中失落的部份，然而，他最終還是失望了…..來台打工卻逃跑的菲律賓外勞，以及住在單身退伍軍人宿舍的中文老師，和有中日血緣的岡村修治，三個人在電影中的交錯相遇，反映在台灣社會中共存的多元文化和族群背景。
曾經演出導演 鄭文堂的電視劇「寒夜續曲」和電影「經過」的蔭山征彥，在《寧靜夏日》飾演一個父母離異、安靜敏感的日本男孩 岡村修治。曾多次獲得金馬獎與金鐘獎的台灣知名演員 常楓，出生於中國 東北地方，曾經在日治時期的滿州國內擔任日本橫濱銀行的職員。常楓通曉日語，在戰後隨國民政府來台，展開他的演藝生涯，而常楓的人生經歷與片中的外省退伍老兵的角色有許多的巧合之處。菲律賓人Renato Oytas，一個有演戲天賦的非職業演員，誠懇熱情的他，在影片中認真地扮演生活中的自己。
. 《寧靜夏日》為日本導演 藤田修平以四年時間所獨立製作的劇情/記錄片。藤田曾擔任台灣導演 郭亮吟的紀錄片「尋找1946消失的日本飛機」、「綠的海平線」之攝影師和研究員，住在台北萬華區西門町一帶，在台期間訪問許多台灣家庭和人物，深入了解台灣與日本之間的歷史，並同時照料菲勞朋友的生活。藤田決定將自己在台的親身體驗和周遭朋友的故事，拍攝、製作成為電影《寧靜夏日》。
Quiet Summer tells the tales of three men, who came to Taiwan from Japan, China, and Philippines. The main character Shuji comes to Taiwan to find the place for the ashes of his mother. His travel is the search for his identity with the hope for the re-connection between his mother and father, and at the same time, quietly represents the lives and stories of a middle-aged Filipino worker, who ends up as a run-away laborer, and an old Chinese teacher, who lives alone in a poor and single Chinese veteran community, in which all the residents were relocated from China to Taiwan during the Civil War in 1949. Ironically, the Filipino laborer, the Chinese teacher who might have fought against Japan, and a young hybrid between Japanese and Taiwanese, all of whom have different backgrounds, are connected to each other in this film as many people with diverse backgrounds are connected in the Taiwanese society.
Yukihiko Kageyama plays a role of Shuji, a sensitive young man grew up in a divorced family. Chang Fong, who is a legendary actor in Taiwanese cinema and born in Manchuria under the Japanese reign, shares the similar background with the role of the Chinese teacher. Filipino laborer Renato Oytas, who suffered from the insecure life as an laborer in Taiwan, acted himself in the factory he was working for. Quiet Summer is a narrative film but strongly reflects the personal experiences and backgrounds of the director and actors in the society of Taiwan.
Quiet Summer is a feature-length personal narrative/documentary film independently made by Shuhei Fujita, who spent four years to complete this film in Taiwan. He came to Taiwan to involve himself into documentary production as a researcher and cinematographer. While he visited a lot of local families and stayed in the old district of Taipei, he discovered unknown history between Taiwan and Japan and also had taken care of the Filipino laborers in the city of Taipei. He decided to make a film based on his own experiences and the real stories of the people he met.
