德国牧羊犬玛莎（船越英一郎 配音）曾经是一条立过赫赫功勋的警犬，而今退役的玛莎成为莲见家的一员。莲见家的男主人生前是一位报社记者，后来却神秘死于某事件。现如今，女主人杏子（财前直见 饰）继承并经营着专门服务于女性的莲见侦探事务所，包括长女加代子（泷本美织 饰）在内，调查员君冢奈奈（平山绫 饰）、长岛桃子（白鸟久美子 饰）、三浦美智子（根岸季衣 饰）等全由女性组成。从玛莎的视角为基准，现代都市繁荣的表象下，一桩桩令人心寒的案件接连上演。何为真相？何为谎言？ 本片根据宫部美雪的同名推理小说改编。
Plot Summary:Hasumi Kayoko (Takimoto Miori), the rookie investigator at the all-female Hasumi Detective Agency, always observes people and cases in a level-headed manner. She detests lies and secrets, and has a strong sense of justice. Her late father worked at the city news desk of a newspaper, but committed suicide 7 years ago. However, the truth lies in darkness and Kayoko's mother, Kyoko (Zaizen Naomi), the agency's director, has been secretly pursuing the facts. An incident becomes the catalyst that entwines Kayoko and the people around her, and she closes in on the truth behind her father's death.
