A continuation of the Last train to Busan.
Jung-seok, a former soldier who managed to escape from the Korean zombie-infested peninsula. But the latter is forced to return to Seoul for a final mission. He discovers with amazement that uninfected people are still present and left to fend for themselves.

After his 18-year-old daughter Sarah, his family sawmill represents the whole of Said’s life. For years, he hardly maintained his business afloat, mainly for his employees, all former prisoners and young people in reintegration; until one of them uses the sawmill to hide a drug-stuffed car. When the cartel to which she belongs arrives at the sawmill, Saïd and Sarah will have to do everything to protect it. They have an advantage: this sawmill is their land, they know every corner of it…