Manekarezaru Kyaku / Kobunsha Bunko Sa 3-107 SASAZAWA SAHO Collection

[Machine Translation] The case began with the discovery of a spy who had slipped the Commerce and Industry Ministry union's secret struggle plans. The suspected spy, a union member, and a woman mistakenly identified as his common-law wife are killed, and the suspects in both cases die in accidents. An article in a weekly magazine leads a police lieutenant to question the case, and his challenge is to solve the mystery of an ironclad alibi, a code, and a locked room. This is a masterpiece of a real mystery novel, the debut work of Saibo Sasazawa and his masterpiece.

事件は、商産省組合の秘密闘争計画を筒抜けにしたスパイを発見した事が発端だった。スパイと目された組合員、そして彼の内縁の妻に誤認された女性が殺され、二つの事件の容疑者は事故で死亡する。ある週刊誌の記事から、事件に疑問を感じた警部補が挑むのは、鉄壁のアリバイと暗号、そして密室の謎。笹沢左保のデビュー作にして代表作となる傑作本格推理小説。