Yong-hu (PARK Seo-jun) is a mixed martial artist who has a world title. Having lost his father when he was a child despite his prayers, he is an atheist who only believes in his fists. But when he wakes up one day with stigmata, he eventually agrees to visit a church to seek answers. As luck would have it, he arrives just in time to save Father AHN (AHN Sung-ki) from an exorcism going awry, the holiness of the marks on his hands allowing him to banish this kind of demonic entity in a more direct way. Yong-hu accepts to put his fists to good use and takes upon himself to save people from a mysterious evil that is taking possession of them, with Father AHN to guide him on his mission. The pair soon finds out that all the evidence point to a Jisin (WOO Do-hwan), a shamanic guardian deity.
Two years after his buddy cop comedy film Midnight Runners (2017) became a surprise hit, director Jason KIM comes back but this time in the religious thriller, a sub-genre that came into prominence recently thanks to popular titles such as The Priests (2015) and THE WAILING (2016). KIM is reuniting with PARK Seo-jun of Midnight Runners. Playing the Catholic priest is veteran actor AHN Sung-ki, who first cut his teeth in KIM Ki-young’s The Housemaid (1960) and later became one of the most iconic actors of the 1980s and 1990s.