July 2013. The heat blankets Lisbon. Humberto, a nihilistic inspector of the Criminal Investigation Police, inquiries the appearance of a woman’s corpse on the River Tagus. While the investigation is under way, the country, troubled by an intense economic and social crisis, is about to collapse. A second corpse is added to the first, and then a third and a fourth, in the days that follow. Young women with no apparent connection are killed with increasing brutality.