Holy Night: Demon Hunters

In modern-day Seoul, residents are plagued by a series of unexplained phenomena. This includes ritualistic murders, possessions, and widespread mass hysteria that sends the city spiraling into fear and chaos.

The turmoil in the city is traced back to the shadowy cult known as the Black Mass. This secretive organization is dedicated to summoning an ancient demon named Asmodeus, intensifying the supernatural chaos threatening the city.

In their desperation to combat the supernatural terror, the local law enforcement enlists the help of a unique demon-hunting unit known as the Holy Night. This trio, consisting of Ba Woo, Sharon, and Kim Gun, brings different skills to confront the threat.

Young Eun-seo begins to demonstrate alarming signs of possession, leading her older sister Jung-won to seek help. As a neuropsychiatrist, Jung-won is initially skeptical but recognizes the urgency of their situation as her sister's condition worsens.

Traditional medical remedies fail to provide relief for Eun-seo, prompting Jung-won to confront her disbelief in the paranormal. She reluctantly turns to the Holy Night, hoping they can save her sister from the inherited darkness.

As the Holy Night delves deeper into their investigation, they reveal a disturbing series of disappearances and desecrated churches. Each site holds clues that connect to the Black Mass's sinister plans.

The team encounters violent confrontations with possessed cult members. These encounters test their resolve, pushing them to face both physical attacks and psychological terrors that threaten to unravel their sanity.

During their investigation, Kim Gun discovers unsettling information about his estranged father, who was previously involved with the cult's earlier incarnation. This revelation adds a personal stake to their mission.

As time ticks away, the Black Mass cult prepares for the final summoning ritual in a decaying cathedral hidden beneath the city. The Holy Night must act quickly to thwart this impending catastrophe.

In a climactic showdown, the Holy Night storms the cathedral where the cult conducts the final ritual. A fierce battle ensues, with Ba Woo confronting possessed enforcers, Sharon facing the high priest, and Kim Gun working to break the protective spells.

In a bold twist, Ba Woo allows part of the demon Asmodeus to possess him, becoming a temporary vessel. This risky move provides him with the power needed to combat the summoning ritual while Sharon guides him through an exorcism.

With unprecedented energy coursing through him, Ba Woo uses the demon's own power to destroy the summoning circle. The backlash almost proves fatal for the Holy Night team, but it ultimately banishes Asmodeus back to the underworld.

As a result of Ba Woo's sacrifice, Eun-seo is freed from Asmodeus' possession. However, the experience leaves her with fragmented memories as she begins the long road to recovery, still haunted by the darkness.

In the wake of the battle, the Black Mass cult is dismantled, but its scars remain. Jung-won, now a believer, joins the Holy Night, ready to lend her medical expertise to future missions in the ongoing fight against evil.

In a closing scene, the Holy Night receives a mysterious file. This signals that new darkness is already building elsewhere, leaving the team with the knowledge that their fight against evil is far from over.