Only God Knows Everything

While hearing a believer's confession shortly after being ordained a priest, Do-woon learns a shocking truth about his mother's disappearance 13 years ago. Torn between the seal of confession and a desire for revenge, he finally decides to uncover the truth behind the incident.

• Shin Seung-ho as Jung Do-woon: A young Catholic priest who was raised by Father Yo-han after his mother's disappearance;
• Han Ji-eun as Yoon Joo-young: A homicide detective investigating the disappearance of Do-woon's mother;
• Park Myung-hoon as Shim Gwang-woon: A bizarre and violent shaman;
• Jeon So-min as Baek Soo-yeon: A fanatic woman involved in the Jeonsingyo sect.

The film is the first production of CJ ENM's O'pen project, which is dedicated to discovering and developing new creative talent.^[1] Ko Jun-seok's original screenplay made it to the top six of the competition and caught the attention of director Paek Seung-hwan, who decided to use the story to explore his doubts about faith and religion.^[2] The original title was At the Border (Korean: 경계인; RR: Gyeonggyein): Only God Knows Everything, but Paek was so intrigued by the subtitle that he decided to retitle the film.^[3][4]

Filming began on March 3, 2023, and five days later, it was announced that the main cast would consist of Shin Seung-ho, Han Ji-eun, Park Myung-hoon, and Jeon So-min, while Yoo Sung-joo, Lee Jung-ok, and Nam Joong-kyu would play supporting roles.^[1] The crew wrapped filming in November 2023.^[5]

Shin Seung-ho had previously been directed by Paek in Double Patty (2021), forming a close friendship with him; the director didn't say much when he offered him the lead role in Only God Knows Everything, other than that he thought Shin would look good in a cassock.^[6] Shin accepted because the character had little in common with him or his previous work, thus presenting a challenge.^[2] Being a Protestant, the actor interacted with several Catholic priests to better understand the role.^[7]

Park Myung-hoon gained 10 kg (22 lb) to play the role of the shaman.^[8] Jeon So-min was cast because Paek was impressed by her intense gaze in the 2021–2022 TV series Show Window: The Queen's House, even though the role was originally intended for an older actress.^[9]

The soundtrack was entirely composed, arranged and performed by Lee Sang-hoon for 4Bros. Music and was released on streaming platforms on August 22, 2025, the same date as the film.^[10]

On July 14, 2025, four individual posters for the lead actors were released, each featuring an individual tagline.^[11] A week later, the main poster was released, accompanied by the phrase "A shocking confession. Will he keep it a secret or seek revenge?".^[12] The trailer was uploaded online on July 28, revealing the theatrical release date of August 22.^[13] On August 6, a special poster featuring Shin Seung-ho with an anguished expression and a rosary in his hand was released.^[14]

On August 13, the main cast and the director presented the film to the public and press at the Megabox COEX.^[3] On August 24, Shin and Han appeared on a taped episode of actor Yoo Yeon-seok's talk show Yoobari Talkbari to promote the film.^[15]

Only God Knows Everything was invited to participate in the Korean Fantastic: Feature-Lengths section of the 29th Bucheon International Fantastic Film Festival, where it had its world premiere^[16] on July 6 and 8, 2025,^[17] receiving an enthusiastic response from audiences.^[18]

It was released in South Korea on August 22, 2025,^[19] after two days of special screenings at CGV, Lotte Cinema, and Megabox theaters at a reduced price.^[20] The film was given a 15 rating by the Korea Media Rating Board due to scenes of murder and physical injury, elements that induce tension and fear, foul language, and allusions to drug use.^[21]

On October 10, 2025, it was made available on the IPTV and VOD services KT Genie TV, SK B TV, LG U+TV, KT Skylife, Watcha, Wavve, Coupang Play, and YouTube Movies.^[22] On December 12, it was released on Netflix.^[23]