Train to Busan is a 2016 South Korean zombie horror film directed by Yeon Sang-ho. The film follows a group of passengers who struggle to survive aboard a train from Seoul to Busan during a zombie apocalypse. The film stars Gong Yoo, Jung Yu-mi, Ma Dong
From Wikipedia
Train to Busan is a 2016 South Korean action horror film directed by Yeon Sang-ho and written by Park Joo-suk. It stars Gong Yoo, Jung Yu-mi, Ma Dong-seok, Kim Su-an, Choi Woo-shik, Ahn So-hee, and Kim Eui-sung. The film takes place primarily on a KTX from Seoul to Busan as a zombie apocalypse suddenly breaks out and threatens the safety of the passengers.