Mack & Mabel tells the story of the tempestuous relationship between Mack Sennett the world renowned silent movie director and his leading lady Mabel Normand after she walks into his life as a complete unknown.

It charts her meteoric rise to fame alongside his rise to star billing at the height of the silent movie era but with dark undertones of the fall from grace that will hit them both – she because of her increasing reliance on drugs to maintain the punishing film scheduling, and he because of the talkies that are taking over his world.