Original Plot:

An American businessman (Ted Hewitt) makes a drunken bet with his comrades after confronting a pan handler that he can survive and flourish in a strange place, where he is not known without any money.
He wakes up with a hangover on a train to Montreal. When he gets there he takes a taxi to a first class hotel and gets the doorman to pay the cabbie. The doorman does this because he is well dressed and well spoken. He checks in on his signature alone.
Ted allows himself to be picked up by a pretty girl (Margot) and goes to a second floor after-hours restaurant where he is forced to admit that he has only 50 cents to his name.
Margot admits that she was out to roll him and decides that she must intervene with her male partner in crime (Louie). He has a salt shaker (I am vague on this point, I don’t remember why) in his pocket. He gets up and leaves the room looking like he is packing a gun. Several watch him go as he is an American in a restaurant catering to locals.
There is a loud argument in the alley below and a shot is heard. Margot is dead when Ted arrives.
There is a small chase in the dark. Daggers are thrown and shots fired. The police arrive and Ted narrowly escapes being caught. Louie is killed. Ted is wanted by the police and a reward is offered for his capture.
Ted Picks up the cabbie (the same one who drove him to the hotel) and, with him, breaks into Margot’s room.
At this point Woolrich decides to wrap it up. In a flash of explanation, Ted splits the reward offered for this crime with the cabbie and gets the reward for killing Louie – a wanted criminal. Ted wires $1,500 back to New York claiming that he has won the bet.