Mai 1980, Séoul. Des manifestations dénonçant la loi martiale proclamée par le dictateur Chun Doo-hwan troublent la routine de Man-seob, un chauffeur de taxi qui décrie ces protestataires qui l’empêchent de travailler. Élevant seul sa fille suite au décès de son épouse, Man-seob est criblé de dettes. Chaque course compte. Lorsqu’il entend un confrère se vanter qu’il s’apprête à recevoir une somme colossale pour emmener un Occidental à Gwangju, il se précipite au point de rendez-vous afin de lui voler son client, un journaliste allemand se faisant appeler Peter. Ce dernier a l’intention d’enquêter clandestinement sur certaines rumeurs voulant que Gwangju soit assiégée par l’armée et que le gouvernement ait coupé toute communication entre la ville et le reste du pays. Man-seob a cependant menti sur sa compréhension de l’anglais et des raisons de leur périple. Il n’a aucune idée de ce dans quoi il s’est embarqué. Dès lors, leur sort sera étroitement lié à celui des habitants de Gwangju.

Une bande d'amis se retrouvent par un bel aprés-midi d'automne. Pour célébrer leurs retrouvailles, ils se réunissent autour d'un pique-nique et se remémorent leur passé. Surgit alors un invité inattendu, Yongho, oublié de tous. L'homme paraît agité et incontrôlable. Il se lance sur des rails et reste immobile, sous les regards médusés de ses anciens amis. A l'arrivée du train, sa vie défile soudain dans son esprit. Ces flash-backs incessants permettent de comprendre les raisons qui l'incitent à agir de la sorte...

Après l’assassinat du président Park Chung-Hee le 26 octobre 1979, la Corée connaît une brève parenthèse démocratique qui favorise l’expression des revendications politiques. Mais le 17 mai 1980, le général Chun Doo-Hwan instaure la loi martiale, révoque l’Assemblée Nationale et fait arrêter les principaux dirigeants de l’opposition dont le leader Kim Dae-Jung (futur condamné à mort, président et Prix Nobel en 2000). La ville de Kwangju dans le sud du pays d’où est originaire Kim , va connaître entre le 18 et le 27 mai des évènements tragiques se concluant par une répression violente des soulèvements des étudiants et des habitants de la ville. En août , le général Chun Doo-Hwan devient président de la République.

En 1980 furent perpétrées en Corée du Sud, des exactions envers des civils qui demandaient plus de liberté, point d’orgue d’un long mouvement de contestation nationale. Ce sombre événement est connu sous le nom du massacre de Gwangju. 26 ans plus tard, de jeunes Coréens issus de tous les milieux vont s'unir pour faire payer les responsables...

A stormy story that comes into Hwapyeong Spot, a place of life with the hopes of three family members, in Gwangju in May 1980.

A young girl is caught up in the 1980 Gwangju massacre, where Korean soldiers killed hundreds, if not thousands, of protesters who opposed the country's takeover by the military the year before. Flashbacks show the girl seeing her mother shot to death in the massacre. The film spurred the Korean public to demand the truth behind the incident, and their government eventually opened previously classified files on the massacre.

Corée 1980. Jeune militant socialiste recherché par l’Armée, Hyun-woo trouve refuge auprès de Yoon-hee, avec qui il vit une histoire d’amour passionnée. Mais il est finalement arrêté et passe 17 ans en prison. À sa sortie, il redécouvre son pays transformé et se souvient de son passé avec Yoon-hee…

20 years after discharge from the army and now an excavator driver, a former paratrooper who had been mobilized to suppress the May 18th Democratic Uprising in Korea in 1980, happens to find a skull in the ground one day. Driving his excavator, he pays visits to his former superiors one by one and realizes they were all both assailants and victims of the times.

Chae-geun is a driver for hire with manic depression. He often talks to his son who is studying in the States and tells him he would keep his promise. He does a favor by acting as a temporary fiancé of a single woman named Jin-hee, who works as a waitress at a restaurant he frequents. Her father, who was a victim of the Gwangju Uprising in 1980, shows him a gun he stashed away 39 years ago and asks Chae-geun to help him exact revenge on those who were responsible for the May 18 incident.

Afin de convaincre le meilleur joueur de base-ball de choisir son université, un recruteur de Séoul est envoyé à Gwang-Ju, la ville où lui-même à fait ses études et était champion de base-ball. Il va alors tomber sur son amour de l'époque, qui l'avait brusquement quitté, sans aucune explication. On suit donc Lim Chang-Jung dans ses difficultés à mettre la main sur le jeune prodige du base-ball, ainsi que dans ses tentatives pour comprendre les raisons de cette séparation soudaine, avec en toile de fond les évènements politiques du 18 mai 1980...

In May of 1980, the city is locked down and phone lines are dead because of protests and struggles in demand of democracy. Just when Gwangju was being ignored by the media, Jurgen Hinzpeter, a reporter from Germany, sneaks in despite the danger!

C'est l'histoire d'un père qui est mort mystérieusement en mai 1980, d'une mère qui vit dans l'ombre avec une balle dans la tête et ne peut oublier le 18 mai et de leur fille, la plus grande actrice de la nation, Hee-soo.

KIM-GUN searches for the whereabouts of a young man whose identity has sparked a national controversy over the 1980 May 18 Gwangju Uprising. Starting with the vague memories of those who had crossed paths with him during that time, the film tracks down those who participated in the Uprising as “Citizen Soldiers.” It also traces KIM’s final steps, based on photographic clues found in the firearms he carried and the “Surveillance Truck No. 10” in which he rode. By identifying KIM-GUN, we believe that we can find valuable leads to resolving the ongoing controversy over May 18. Why did a nameless young man join the Uprising? Why did he take up arms? Where has he gone afterwards? It is the answers to these questions that the film seeks.

The movie is a compilation of the movie "Wilderness" in which a member of the airborne unit who killed a girl during the Gwangju Democratization Movement burned himself to death with remorse and "Mr. Kant's Presentation", the story of a man who wanders around as a result of torture after participating as a civilian army.

The title Good Light, Good Air is oddly paradoxical. Keenly working at the point where his artistic identity and persistent attention on modern Korean history meet, director Im in this film focused on where the history of oppression and struggle intersect between Gwangju and Buenos Aires. In both cities, a great number of people who fought against the dictatorship were slaughtered and disappeared. The people of both societies still live with that trauma. When the testimonies of the victims of the two cities cross over, the film gives us chills as the eerie history of the two is very similar. Through Good Light, Good Air, director Im asks us how we will remember the past from where we stand right now.

There are people whose lives have been shaken by the 'Gwangju Video'. On May of 1980, the course of their lives changed in front of a huge wave of truth in Gwangju. The people who made and spread the 'Gwangju Video' are also the people who had their bodies on the waves. The hidden stories of these people, the 40th anniversary of the Gwangju Uprising, and the pursuit to trace the missing 4 hours of mass shooting will be revealed for the first time.

After the Gwangju Democratization Movement is terminated by brute force, Jong Soo runs from the authorities and goes to Dongducheon in search of Tae Ho, an older neighbor from his hometown. He is a student at Jeonnam University and a night school teacher who is on the run because of his involvement in the Gwangju Movement.

Cheol-gi who dreams of a society that embraces justice begins classes at a night school. There he learns about political and social contradictions and the realities the people face. While doing research on factory conditions with his classmates Tae-il, Min-sook and laborers Hyun-sil and Bong-joon, Cheol-gi learns about the Revitalizing Reforms system and the improper practices in emergency measures. After the military revolution, during the election for a general student body in a move towards democracy, Cheol-gi unwittingly becomes a man on the run when emergency martial law is implemented in response by the government. Cheol-gi blames himself when hears about the deaths of Tae-il and Min-sook during the Gwang-ju Uprising from Hyun-sil and Bong-joon. Just when he and Hyun-sil try to start a new life together, Cheol-gi is arrested and put in jail. Inside the prison, he starts another move towards prison democracy.

This year is the 30th anniversary of the Gwangju Democratization Movement. Though the country commemorates the event as the official historical records, it does not include any 'real' accounts of the people who experienced it firsthand. The students who were part of the movement; the female vendors who made rice balls for the students; the female high school students cooked at the government building; now, past their middle age, they live as ordinary citizens in Gwangju city. How is the event remembered by these people?

The South Korean city of Gwangju, will commemorate the May 18th 1980 uprising in style. They will stage a grand re-enactment of the scenes of the May uprising 25 years earlier, when martial law troops killed civilians, including women and children.