Detective Murdoch continues his inventive detective work with Ogden's unflinching support even after an investigation leads him to a family member that he never knew about.

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, taking 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....