Ana Belén Lianio, Kraken's first love, is found murdered in Álava. The torment of her death resembles an ancient ritual where the victim is hung upside down and submerged in a cauldron of boiling water. The cauldron is an authentic piece from the Bronze Age. And one detail makes the horror even greater: Ana Belén was pregnant... As it soon becomes apparent, the killer will not stop here. He will continue to kill expectant parents, mimicking water rituals, carefully choosing sacred locations in the Basque Country and Cantabria for his crimes. The case awakens painful memories in Kraken, from the summer of 1992, when he and his three best friends first met the enigmatic Ana Belén Lianio – an acquaintance that marked them forever. And at the same time, it instills in him an unprecedented fear. Because Alba, his superior and the woman he loves, is pregnant – and at risk of becoming the killer's next target...