The citizens of Gwangju lead a relatively peaceful life, until one day the military takes over the city, accusing the residents of conspiracy and claiming that they are communist sympathisers preparing a revolution against the current government. Seeing as the soldiers beat defenceless people, mainly students, to death, the citizens are in for retaliation and form a militia.
Activist Hyun-woo is released from prison after a 17-year stint. Journeying back to the village where he spent some time as a fugitive he recalls the time spent with Yoon-hee, a woman who gave him shelter and companionship.
26 years ago, state troops were ordered to open fire on civilians in the city of Gwangju who were demonstrating as apart of a democratic movement. Thousands of civilians were killed. Now, a shooter from the national team, a gang member, a policeman, CEO from a large company and director of a private security outfit get involved in a plan to convict the person responsible for the massacre.