The dairy owner, self-made millionaire Alfred de Nimes, cuts payments to farmers reeling from low prices and animal diseases. Led by Bert, the farmers try to block deliveries to and from the dairy.

Julia blows out the tires of a truck and goes undercover in a speakeasy owned by the biggest gangster in Wisconsin.

Iver disappears while trucks smash through a roadblock, and renegade farmers attempt to smuggle milk on back roads.

The Milk War Murder shows the resilience and determination of farmers, workers, and businesses amid the economic and social upheavals of the 1920s.