Sicarivs: la noche y el silencio

The name of this movie is Sicarivs: la noche y el silencio released in 2015-05-15 and it's main theme is A hit man receives the assignment to kill a woman. But what seems as another job complicates when he is about to execute her, but does not. He will have to go after those who gave him the contract, for, in his profession, those who do not comply with their duty end up dead. But the question remains, why did he not kill the woman?.