”Not knowing” focuses on the life of a family that is not satisfied with their lives. Selma and Sinan are a couple who now find it difficult to endure each other. Umut, the son of the house, is after to prove himself. At the end of high school, rumors start circulating about Umut, who is homosexual. While Selma and Sinan are trying to cope with their tiring marriage, Umut sudde…