Following the adventures of a bunch of nobodies who get up to a whole lot of nothing in the fictional prairie town of Dog River, Saskatchewan, Corner Gas focuses on the life (or lack thereof) of Brent LeRoy, proprietor of a gas station that is the only stop for miles around and a hub of action on the Prairies.

In 1930s Saskatchewan Tommy Douglas, a small town parish pastor, sees the poverty and injustice around him which seem beyond his power to address from the pulpit. Douglas enters politics with the socialist Canadian Commonwealth Federation where his idealism runs into powerful opposition from the wealthy and the powerful. Despite the long odds, Douglas' new calling would soon make him a leader that would transform Canada.