Idea of our thriller

We were discussing in our group the possible ideas of our thriller until Theo had a nice idea about Russian Mafia. When he gave the idea, we began to develop it, but we have also changed it.
Our location is in Russia,Siberia. We see a prisoner with a black bag on his hand and also who's hands are tied up. He is taken by three Russian agents to a quit place where they can finish him. He is brought to the place where the two agents put him down on his knees. One of the agents( who seems to be the main one from all three of them) stands in front of the prisoner with a cigarette in his mouth and asks for a gun( this is going to be said in Russian to make in cooler). The prisoner is behaving himself very calm, he doesn't show any fear, he is still, he is not afraid of them, it seems like he knows that the ending of this will be positive. We see the agent pointing the gun at the prisoner.There is a close up of the trigger of the gun,then we hear a diegetic sound of the shot but we don't see the agent's trigger at the time when the shot happens,we make then a shot of the back of the agents falling down. Both guards arу in a loss,then we see both of them through the sniper aim which signifies that someone else is involved in all this.Both of the guards are shot down and the mysterious sniper reveals. We see the sniper( It is a woman) walking down to the prisoner. As she gets close to him she takes out the bag, then we hear snide remark along the line " Why did it take you so long". Then we see them walking along the forest. The prisoners hands are still tied up but then we see him freeing himself out which lets us know that he could free himself whenever he wanted.