Train to Busan is a fast-paced, fun-filled action-packed film from Korea starring Hong Da-Chul as Choi Sung-Eun, Joo Eun-Hye as Lee Yeong-Soo, and Oh Ji-Hee as Lee Young-Soo. The film, directed by Kim Ki-Duk, tells the story of an unlikely love story between two young Korean women: Park Shin-Soo (Hong Da-Chul), a woman who has come to South Korea seeking a job as a teacher, and Seol In-Soo (Joo Eun-Hye), a Korean War vet who returns to school.
Set in Busan, South Korea, the film follows the lives of these two women in their attempts to escape from their normal daily routines and live normal lives. They are pursued by the evil Choi Sung-Eun, an unscrupulous businessman who wants to make a quick profit in the form of a school for his own selfish motives. Meanwhile, the main protagonist, Lee Yeong-Soo, a Korean War veteran who survived the war only to lose his eyesight and hearing due to a bullet wound he sustained, returns to South Korea with Park in search of a new life. However, they are caught in the middle of Choi's plans and become a target for Park and Choi. The resulting battle between the two friends eventually leads them into a conflict that ends in Choi's defeat and imprisonment.
In the meantime, Lee and Park find themselves back in Seoul, which now seems like a haven to both of them, as well as a perfect place to start anew. With all their issues resolved and a sense of security, they decide to go back to school and earn their degree.
The movie begins as Lee takes Jeon Cheongsang (Joo Eun-Hye) to the train station where he once worked before the war. As the two reminisce about the past, Lee tells Jeon about how he fell in love with Jeon, and that it was Jeon who convinced him to become a teacher.
A few weeks later, Jeon calls Lee and informs him that he is returning to school. In response, Lee accepts Jeon's offer and sets up a meeting with him at a restaurant. Jeon then shows him a video recording of a meeting with Park and Lee. In the video, Park announces his decision to run for president of the Korea Student Association, which upsets the two friends. and drives Jeon crazy with jealousy. Later, in the restaurant, Jeon gets in touch with Park and reveals his plan to get elected President of the country by acclamation, which upsets Park as well.
Meanwhile, Jeon cheongsang and Park are invited to a reunion organized by Choi to get revenge for their loss. This meeting ends with Jeon being arrested along with a number of students and Park and Lee as well, but the meeting provides them with a platform to finally confront their opponents.