In a seemingly peaceful parish, the funeral of the sacristan Eliab Peña marks the beginning of a series of macabre events. During the ceremony, a mysterious man leaves a human heart wrapped by palm leaves and thorns on the altar and leads UNIC to start an investigation. The detectives connect this case to the murder of a theologist in what seemed to be a religious ritual. Excavations on the church land reveal buried bodies and crimes committed more than 15 years before. While the community defends father Tomás, the evidence points to dark secrets in the parish and provoke a whirlwind of intrigue and terror.
