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As the sun sets around Seoul Station, an old man thought to have died sinks his teeth into the warm flesh of a homeless person. Soon, the streets are filled with vicious zombies desperate to feed.

Hae-sun, a runaway, witnesses the frightening sight while her father Suk-gyu and boyfriend desperately search for her. As the attacked become the attackers, the government declares a lock out of the station, leaving the uninfected to struggle desperately against the dangerous undead. With zombie numbers exploding, people without a home to return to, now have to flee without a place to run to, in order to survive.

In the animated prequel to the global breakout hit Train to Busan, see where the horror started...