These films commonly contain a conflict between a protagonist and an antagonist, the protagonist will often be an innocent victim or someone with good intentions at heart, while the antagonist will often be cold, calculating and always providing of a serious threat to the protagonist and those he loves.
The Mise en Scene often involves dark dim lighting which adds tension because it obstructs what can be seen which works to create mystery. The setting is one of the most important aspects in establishing the world of your film and in this genre urban environments which tend to be stricken with poverty. Facial expressions are also used to create tension and looks of fear and anger are often seen.
The posters below show some of the inspiration for our own thriller-mystery film. These are all quite slow paced, violent movies which involve the protagonist striving to solve a crime or seek revenge. Which is a very similar format to our film.