Train to Busan (2016)

A deer is hit by a truck and reanimates after the truck leaves. Seok-woo, a cynical workaholic and divorced father in Seoul, South Korea, bungles a birthday present for his estranged daughter Su-an, and missed out on her recital of the Hawaiian folk song "Aloha ʻOe". He agrees with Su-an to take her to see her mother, Na-young, in Busan.

The next day, they board the KTX 101 for Busan at Seoul Station, along with blue-collar worker Sang-hwa and his pregnant wife Seong-kyeong, high-ranking executive Yon-suk, a high school baseball team including player Yong-guk and his cheerleader girlfriend Jin-hee, elderly sisters In-gil and Jong-gil, and a traumatized homeless man. Just before departure, a scraped up woman boards the train unnoticed at the last minute. News reports reveal that an outbreak is occurring across the Korean Peninsula and the scraped up lady then turns into a zombie. She bites and infects a train attendant, sparking a rapid outbreak on the train.

The survivors flee to other carriages and secure the doors, trapping the horde in the process. The train passes through Cheonan station and continues onto Daejeon Station, where a group of soldiers were deployed to keep the infection at bay. Seok-woo is notified that his company sent an extraction team to pick him and Su-an up. After stopping at Daejeon, the passengers disembark from the train, only to find that the soldiers and those from Seok-woo's company had also fallen to the horde. The passengers flee to the train, becoming separated in different carriages in the commotion.

The conductor cancels all stops except for Busan, where the army has established a quarantine. Seok-woo, Sang-hwa, and Yong-guk arm themselves, sneak and fight through the zombie horde to reunite with Su-an, Seong-kyeong, In-gil and the homeless man in another carriage. The remaining passengers, fearing that the survivors are infected, refuse to let them into their carriage and block the door. Seok-woo and the others start to try to get into the safe carriage but Sang-hwa is bitten during the process. He tells Seok-woo to look after Seong-kyeong, name their daughter Yoon Su-yun, and sacrifices himself to buy the others time to force open the door; In-gil sacrifices herself to ensure Seong-kyeong and Su-an's survival in the process.

Yon-suk, train attendant Ki-chul, and the other passengers demand that the new passengers leave their train compartment and isolate themselves in the front vestibule. Jong-gil, disgusted at everyone else's selfishness and paranoia, opens the door to let the zombies in and kill everyone else left onboard. Yon-suk and Ki-chul manage to escape by hiding in a bathroom. Seok-woo learns from a phone call that his company was indirectly responsible for the outbreak. A blocked track at Dongdaegu Station forces the train to stop and the driver disembarks to find another train. Yon-suk escapes after pushing Ki-chul into the zombies.

A flaming locomotive arrives and crashes into some of the zombie-filled passenger carriages, trapping Seok-woo, Su-an, Seong-kyeong, and the homeless man beneath a toppled carriage. Yong-guk and Jin-hee got split up from the party and are used as bait by Yon-suk, as he escapes on the new train. The conductor starts up another train on a separate track and tries to help an injured Yon-suk, but is mauled in the process. The homeless man sacrifices himself so Seok-woo, Su-an and Seong-kyeong find their way out from under the carriage.

Seok-woo, Su-an, and Seong-kyeong board the new train, only to find an infected Yon-suk, who desperately begs them for help before turning into a zombie. Seok-woo fights and manages to throw him off the train, but his hand is bitten in the struggle. In his last moments of consciousness, he puts Su-an and Seong-kyeong inside the engine room, tells Seong-kyeong how to drive the train and says goodbye to Su-an. Before succumbing to the infection, he runs to the back of the train and reminisces about Su-an's birth before throwing himself off.

The surviving pair arrive at a blockade of corpses and barbed wire outside a tunnel near Busan and both walk through the tunnel. A grop of soldiers mistake them for zombies, and just as the soldiers are about to shoot, Su-an sings "Aloha 'Oe" to calm her nerves and pay tribute to her father. Their singing alerts the soldier that they are not infected and brings both of them to safety.