Solitude and violence in the daily life of two men in Mexico City:
 Efraín, a violent ex-cop turned hit man, faces an existential crisis when he is given his next target: a seemingly harmless family man; Efraín will have to confront the decisions that have led him there, his loneliness and the threats of violence that he will come if he does not carry out the job.
 Elsewhere in the city, David, a man affected by a recent tragedy in his life, decides to cope with the solitary routine of pain by shutting himself up at home, until little by little he begins to descend into the despair of alcohol and the escapism that the window of his room gives him towards the outside world.