An existentially depressed man becomes a pickpocket, has a difficult relationship with his mother, gets trained by pickpockets who are more skilled than he is, and remains existentially depressed. Also, there are a girl, a best friend, and a detective.
I've never liked movies where each character says exactly what he or she is thinking, so I enjoyed this movie. In a couple of scenes the actors and directors let pauses, glances, and facial expressions do the work that dialogue normally would. And the action sequences have no dialogue and almost no sound, which in a weird way makes them more exciting.
This movie has many similarities to Crime and Punishment, but without all that bludgeoning. Maybe they should have called it Petty Crime and Punishment.