A young woman is struck by the subway, and Inspector Salgado must venture out into the cold night of Barcelona: Was it suicide? But what does the only photo on her phone mean: the stiff bodies of three hanged dogs? Salgado gets to work in his own uncompromising way, which has already cost him more in the past than he would like. He talks to the victim's colleagues at a cosmetics company, but their boss is evasive, and the young colleagues can hardly get a straight word out. No one in this company can be trusted, and then Salgado learns of another tragedy: Another employee has shot himself in the head – after he had brutally executed his wife and young daughter...