A homeless man walks around the Seoul Station area with a bloody wound on his neck until he reaches Seoul Station and lays down. A fellow squatter sits next to him, notices the blood and tries to get help, but the injured man is no longer alive when he returns. The squatter goes to the transit police to report the man's death; the officers follow him, but the man is gone. The squatter goes to search for the old man and finds him as a zombie, who attacks him.

Hye-sun, who ran away from her former life in a brothel, now lives with her boyfriend, Ki-woong, who intends to pimp Hye-sun out again due to money problems. After a fight about this, the two separate and are caught in the chaos bursting out of Seoul Station. Hye-sun escapes with a few survivors into a police station, where they are trapped by a group of zombies within a jail cell, along with a policeman bitten by a zombie. Meanwhile, Hye-sun's father, Suk-gyu, interrogates Ki-woong for his daughter's location. The two go to Hye-sun's home, only to find that the landlady has become a zombie. Sun-gyu and Ki-woong both hide in the bathroom after another zombie attacks them, escape through the bathroom window and climb to the roof. Sun-gyu devises a plan with Ki-woong to get the zombies' attention, while he goes down to get the car. They drive away in shock, but focus on finding Hye-sun.

At the police station, the bitten officer calls for backup before succumbing to his infection, reanimating and biting another survivor in the cell. The Riot Police arrives just in time and draws the infected away, allowing Hye-sun and an old man to escape the cell and get into an ambulance. The ambulance crew seems oblivious to what is happening to the infected. Hye-sun calls Ki-woong that she is heading to the hospital and to meet her there. The old man panics when he realizes they are en route to the hospital, where many reports of bite wounds appear to be coming in. He attempts to take the wheel from the driver and causes the vehicle to crash. Hye-sun and the old man flee through the subway tunnels. Meanwhile, Suk-gyu and Ki-woong make their way to the hospital, but discover that the zombies have already taken over the place. They barely escape before continuing their search.

Outside Hoehyeon Station, Ki-woong calls Hye-sun, but their conversation alerts the nearby infected. A group of people call them to a makeshift barricade while fighting off the infected. The two are saved, only to realize they were placed in a quarantine by riot police, who mistakenly believe the crisis to be an insurrection. Suk-gyu and Ki-woong try to persuade the police to let them through, but are rejected, as martial law has been declared without reason. The survivors slowly succumb to growing numbers of infected people. After a speech on his poor position in society, the old man attempts to climb over the police blockade to warn the government officials about the zombies, but is killed by gunfire from the summoned military. The infected charge in and overrun the barricade; Hye-sun is able to escape, but is scratched on her foot by a zombie.

Hye-sun makes her way into an empty model apartment and notifies Ki-woong of her location. When Ki-woong and Hye-sun are reunited, she reveals that Suk-gyu is not her father but rather her previous pimp. Suk-gyu has been searching for her because she has stolen back her late natural parents' money he was keeping for himself. This outrages Ki-woong, who thought a deal was made to help him reunite with his girlfriend, yet Suk-gyu becomes violent to the point where he explains that he wants revenge on Hye-sun for theft. Ki-woong tries to subdue Suk-gyu with a knife, but the latter takes the knife from the former and kills him. Hye-sun tries to flee but Suk-gyu subdues her. As Suk-gyu prepares to rape her, Hye-sun dies. Suk-gyu frantically applies CPR, but then he spots the scratch on Hye-sun's foot and realizes that she is infected. As Hye-sun reanimates and kills Suk-gyu, the camera zooms past a dead Ki-woong and the infected overrunning the quarantine.

• Shim Eun-kyung^[11] as Hye-sun
• Ryu Seung-ryong^[12] as Suk-gyu
• Lee Joon^[11] as Ki-woong

On the review aggregator website Rotten Tomatoes, 100% of 23 critics' reviews are positive, with an average rating of 7.0/10. The website's consensus reads: "Thrilling and relentless from start to finish, Yeon Sang-ho's Seoul Station is a layered and vicious entry into the zombie genre."^[13] Clarence Tsui of The Hollywood Reporter called the film "a simple, thrilling ride through a fiend-infested world."^[5] James Marsh of South China Morning Post gave a rating of 3/5. He commented that the film addresses South Korea's societal issues including prostitution and homelessness.^[14] Gwilym Mumford of The Guardian also gave the film a 3/5 rating. He stated that this film is different from Train to Busan because it focuses on the "desperate souls trapped in life's margins."^[15] According to Box Office Mojo, the film has a cumulative gross of $2,021,735 worldwide.^[4]

The film debuted on 5 April 2016 at the Brussels International Fantastic Film Festival.^[5] Created by Yeon San-ho, this animated film is considered as the prequel to his critically acclaimed movie, Train to Busan.^[16] American distributor Filmrise released the DVD and Blu-ray versions of Seoul Station on 25 July 2017.^[17] The animated film is also available to stream on Amazon Prime Video, Tubi, Apple TV and Shudder.

• Seoul Station at the Korean Movie Database
• Seoul Station at IMDb  
• Seoul Station at HanCinema