At the center of the Mexican drama series "Oscuro deseo" is a forty-year-old woman named Alma Solares. She works as a professor at a university and dedicates a lot of time to her career. For 20 years, Alma has been living with her husband, a judge, and has no idea how easily their peaceful family life will be shattered. However, a weekend trip to a close friend turns Alma's familiar world upside down and sets off a chain of monstrous consequences.