Train to Busan is a 2016 South Korean action horror film directed by Yeon Sang-ho, written by Park Joo-suk, and starring Gong Yoo, Jung Yu-mi, Ma Dong-seok, Kim Su-an, Choi Woo-shik, Ahn So-hee, and Kim Eui-sung. The film mostly takes place on a KTX from Seoul to Busan as a zombie apocalypse suddenly breaks out in the country and threatens the safety of the passengers.