When a medical student (Catalina Sopelana) receives a life-changing heart transplant, her gratefulness inspires her to visit her donor’s family in a remote village where they live. But her presence triggers a killer — connected to two decades of missing persons cases — to hunt again. Adapted from the novel by Javier Castillo, the Spanish thriller also stars Álex García (El Inmortal), Alfons Nieto (Elite), and Itziar Ituño (Money Heist).