Ryo is a young teacher who, unlike her colleagues, does not adopt an authoritarian attitude to the adolescents she has in her care. She does not realize at first that, by doing this, she is putting herself at risk. The 14-year-olds feel misunderstood by the adults who insensitively snuff out their young ambitions. When their frustration grows, the adolescents turn into secretive and hard-bitten kids. As a result, Ryo is thrown back in time and confronted with her own dark past, in which she resisted the insensitive world of her superiors. Then she meets Koichi, a man she knows from her studies. It becomes clear that Ryo and Koichi have shared experiences that they can only now relive and then come to terms with.