Olga discovers the unfinished diary of a notorious killer and becomes captivated by its dark secrets. As she delves deeper, she uncovers a mysterious connection between them, putting her life—and the lives of those around her—in grave danger.

Nicolás, a photographer, has suffered epilepsy since childhood and he is forced to take care of himself and sacrifice a lot, though he lives a normal life. On the other hand, Isabel is a woman who, apparently, has her whole life figured out although her mother is ill and she has no choice but to try to save her. Isabel and Nicolás fall in love in spite of themselves, their demons, their ghosts, and their weaknesses. Suddenly engaged in a relationship none of them would have even dared to imagine, they experience the love, passion, insecurity, fear, and allergy to commitment typical in people who are drifting away.