Irene Ochoa had been feeling trapped for some time, the walls getting closer and closer as her husband’s beatings became a routine. She had no other weapon than her instinct of survival. She is out of options: it’s Marcos’s life, or hers. The opportunity arises on a Wednesday, when he comes home drunker than usual and, after a couple of sips, falls deeply asleep. A few hours later, the firemen get there, and the police investigate the causes of a fire. Evidence point to an accidental death. Everything has gone according to plan, except for one thing: Irene could not envision that she would fall madly in love with David Vázquez, the detective in charge of the case, and that she will have to take drastic measures to protect her new life. When Pamplona is still in shock for the accident, detective Vázquez has to solve one of the hardest cases he has ever faced: several pilgrims in the Way of St. James have turned up dead in Roncesvalles, only a few miles away, and everything indicates that it is the work of a serial killer.