English translated order for this Prosecutor Kirishima edition #1. The original order is #2. When he loses his job as a trader after the stock market crashes, Shigeo Segawa is offered lucrative work as an industrial spy. How could he say no? He is soon assigned to seduce an ex-girlfriend and steal an important formula from her husband, who runs a large chemical company. But when the husband is found murdered, Segawa becomes the prime suspect.

Etsuko has fallen in love with the shy young university lecturer who clumsily courts her. But her family objects to his past: his father was a war criminal; his deceased younger brother, a murderer. When Etsuko lies to force the marriage through, she thinks their troubles are over, but on their wedding night, the groom leaves in response to an urgent phone call. In the morning, he is still missing.