As the movie is kind of a gangster flick, there is lots of violence in the movie.
A man is showing the lead actor some clips from the movie on how to 'Stab the body' from the front to make it drown in the river. Later, this is implemented but is off-camera.
It is implied that the actress was beaten up by her 'teacher' and was sexually harassed. Later, she hits him with an utensil on the head and runs away.
The lead actor goes for cage fights to beat and get beaten up. bloody.
Lots of gunshots towards the end though those sequences are given background music to lighten the tone.