The colour of a dog running away

A cryptic postcard leads musician and translator Lucas into a web of bizarre events, culminating in his and his girlfriend Nuria's kidnapping by a centuries-old religious cult. As they navigate this unsettling journey, the couple confronts the cult's mysterious origins and the dark forces at play. The story intertwines themes of faith, power, and the impact of the past on the present, challenging Lucas and Nuria to unravel the truth behind their perilous situation.