In a slum called Easy Street, the police are failing to maintain law and order.
The Little Tramp is sleeping rough outside a mission near the streets of a lawless slum. He is reformed somewhat at the mission where there is singing and religious education. His religious awakening is inspired by a beautiful young woman who pleads for him to stay at the mission.
Spotting a help wanted ad for a job at the police station, the Little Tramp accepts and is assigned the rough-and-tumble Easy Street as his beat. Upon entering the street he finds a bully roughing up the locals and pilfering their money. The Little Tramp gets on the wrong side of the bully and following a chase the two eventually come to blows culminating in the Little Tramp inventively using a gas lamp to render the bully unconscious.
The bully is taken away by the police but manages to escape from the station and returns to Easy Street. After a long chase the Little Tramp manages to knock the bully unconscious by dropping a heavy stove on his head from an upstairs window. On returning to his beat on Easy Street the unruly mob knock the Little Tramp unconscious and drop him into a nearby cellar where he manages to save the aforementioned beautiful young woman from a nasty drug addict after accidentally sitting on the drug addict’s needle. Supercharged by the effects of the drug he takes on the mob and heroically defeats them all and as a consequence restores peace and order to Easy Street. By the end of the film, even the bully has become a respectable, churchgoing citizen.