Glasgow, 1932. When Charles Geddes, son-in-law of one of the city's wealthiest shipbuilders, is found floating in the River Clyde with his throat cut, his beautiful widow Isla Lockhart asks for Inspector James Dreghorn to lead the murder case.
Dreghorn has a troubled history with the powerful Lockhart family that stretches back to before the First World War and is reluctant to become involved. But facing pressure from his superiors, he has no choice in the matter. The investigation takes him and his partner 'Bonnie' Archie McDaid from the flying fists and flashing blades of the Glasgow underworld to the backstabbing upper echelons of government and big business in order to find out who wanted Charles Geddes dead and why.
