Luis is a gray bank employee, calm, patient and a good person, one of those invisible people that nobody notices when you cross them on the street. He lives humbled by his wife Úrsula, who has completely annulled him. When she turns up dead, life seems to be resolved for Luis. Despite the fact that he is the number one suspect, his alibi is irrefutable. But on this occasion, Laura Lebrel's sense of smell may be nullified, since the interest she shows in the case is not strictly professional. For the first time in her life, her feelings for the suspect will bring unexpected consequences.