Why did Tsuneo's shy wife end up stone dead in a boutique in a louche Tokyo neighborhood? He discovers she's been having an affair, and, in a moment of panic, kills her lover. No apparent motive, no witnesses, a faltering investigation. But the pressure builds and Tsuneo starts making mistakes.
While on a business trip, Tsuneo Asai receives the news that his wife has died. She had a heart condition so it doesn't come as a shock; however, the circumstances surrounding it are unexpected. While uncovering the truth, Tsuneo kills someone, and finds himself hunted.