Having lost his parents at a young age, Min-woo takes care of his younger brother Jin-woo much like a father would. He harbors a secret crush on Shin-ae, a nurse he meets at a church gathering, and persuades her to go on a date with him to the movies. But not long after the film begins, they hear the sound of sirens and are rushed out of the theater. Outside they find chaos in the streets: Tear gas dances wildly and soldiers mobilized for crowd control have taken to violent beatings. Bewildered and enraged, the citizens form a militia, determined to protect the ones they love - and Min-woo finds himself in the middle of it all.