No Other Choice

Man-su, an award-winning veteran employee at a papermaking company, lives happily in his beloved childhood home with his wife Mi-ri and their children: Si-one, Mi-ri's teenage son from a previous marriage, and Ri-one, an autistic cello prodigy. The company is bought out and a devastated Man-su is laid off after defending his fellow workers, but assures his family he will resume papermaking within three months.

Thirteen months later, Man-su has been unable to find another job in the papermaking industry. His family is forced to minimize their spending, including rehoming their two dogs with Mi-ri's parents, upsetting Ri-one, whose cello teacher recommends her for expensive advanced classes. The family considers selling their home to the parents of Si-one's friend Dong-ho, and Mi-ri takes a part-time job as a dental assistant to suave dentist Jin-ho, while Man-su endures a toothache he cannot afford to treat.

Man-su attempts to join the successful Moon Paper company, but is humiliated by manager Seon-chul. Wanting his job, Man-su nearly kills Seon-chul with a potted plant, but realises this will not matter unless he is the best candidate to replace him. Instead, Man-su uses a fake job advertisement to identify his chief competitors: Beom-mo and Si-jo. Retrieving his father's Vietnam War gun, he prepares to kill Seon-chul, Beom-mo, and Si-jo to eliminate his competition.

Spying on Beom-mo, an unemployed drunkard, Man-su is bitten by a snake and treated by Beom-mo's dissatisfied wife, A-ra, and is later unable to stop Beom-mo from discovering A-ra's infidelity. A-ra finds Man-su confronting Beom-mo at gunpoint, leading to a struggle for the gun, but A-ra shoots Beom-mo dead and Man-su escapes. He arrives late to a costumed party, where Mi-ri dances with Jin-ho instead. A-ra and her lover bury Beom-mo, but Man-su recovers the gun.

Man-su and Mi-ri accuse each other of infidelity, and she reminds him that he was a violent drunk when Si-one was very young, but they reconcile. At the shoe store where Si-jo works, Man-su recognises him as a kindred devoted father, but tricks him into staying late and feigns car trouble; when Si-jo stops to help, Man-su reluctantly shoots him and drives away with his corpse.

Si-one and Dong-ho are arrested for stealing iPhones from Dong-ho's father's store, but Man-su and Mi-ri blackmail Dong-ho's father, who used the store for his own infidelity, into having Dong-ho take the blame. Detectives question Man-su about Beom-mo and Si-jo's disappearances, having linked them as unemployed paper men. Smoking on the roof, Si-one witnesses Man-su in his greenhouse trying to dismember Si-jo's corpse with a chainsaw. Unable to do so, Man-su buries the body in his garden, alongside Si-one's stolen iPhones, and plants an apple tree.

Plying Seon-chul with alcohol at his remote cabin, Man-su breaks his sobriety and drunkenly extracts his own tooth. Haunted by nightmares about his father and the chainsaw, Si-one informs his mother, who digs up the tree and calls Man-su. Determined to protect his family, Man-su suffocates Seon-chul with meat and stages his death to appear as if he choked on his own vomit. Mi-ri tells Si-one that Man-su dismembered and buried a pig to nourish the apple tree, and she and Man-su come to a tense understanding.

Moon Paper hires Man-su to replace Seon-chul, allowing the family to keep their home and reunite with their dogs. Ri-one's antisocial behavior improves, and Mi-ri realises her unusual drawings are actually musical compositions. The detectives reveal that A-ra has implicated Beom-mo as a gun-owner, and conclude that he murdered Si-jo and went on the run, lifting suspicion off Man-su. At his new job, Man-su celebrates alone in a modern paper mill run by machines instead of workers.