Tokyo in April was shrouded in continuous cold fog, and the first unknown female corpse was discovered on the bank of the Sumida River - no injuries, no struggle, no traces, and a nearly perfect serial murder case began.
When trainee inspector Morio Chinatsu first entered the Metropolitan Police Department, she was assigned to replace Kiryu Yukiko, a police officer who was cold and distant and had a secret past of ten years. One is fiery and pure, full of justice, the other is silent and cold, trapped in the shadow of old sins. The two walk side by side at the murder scene and in the dark corners of human nature.
Intent: It tells the story of an adult woman in darkness who is redeemed by the pure love of her youth; a young policeman with justice in mind completes his growth after facing his old sins and the truth. It explores that justice is not perfect, but love can withstand the long darkness; the past cannot be pursued, but the human heart can be redeemed by gentleness, stick to the bottom line, face the truth, and bravely pursue taboo but sincere feelings.