Side Street plot
"Where temptation lurks!"
Postman Joe Norson steals a fallen envelope containing $30,000. What Joe doesn't realize is that this stolen money was meant to pay off in an extortion case. Regretted for this theft, Joe tries to return the envelope with money to the lawyer, the addressee of the envelope. However, because he is involved in the extortion case, the lawyer pretends not to know anything about the money. Joe leaves the money with a good friend, who quietly takes it off. The blackmailers track down Joe and force him to hand over his friend to them. However, it is nowhere to be found. Joe finds himself in a life-and-death struggle with these blackmailers, culminating in a wild car chase through the streets of Manhattan, New York.