Set in 1920s Toronto, the series follows the city's only female private detectives as they take on cases the police don't want to touch. In a time of change and hopefulness, their gender is their biggest advantage as they defy expectations and rebel against convention. The Private Detectives take on cases that explore every cross-section of Toronto, from gospel church choirs, bathing beauties and the early cinema scene, to the homes and private parties of the city's elite.