Kyung-mi and her mother, who rely on sign language to communicate, are walking home after a late-night shopping trip when they encounter a charming young man named Young-min. He appears to be lost and asks for directions, but quickly takes a sinister turn, threatening them with a knife and dragging them into a dark alley.
For the next several hours, Kyung-mi and her mother are held captive by Young-min, who alternates between moments of kindness and extreme violence. As they struggle to survive, they desperately try to figure out a way to escape their captor's clutches.
As the night wears on, they learn that Young-min is a ruthless serial killer who preys on vulnerable women and girls. With no help in sight, Kyung-mi and her mother must use their wits and resourcefulness to outsmart their captor and stay alive until morning, when they can hope to make it to safety.
With its dark, suspenseful storyline and powerful performances from its deaf cast, Midnight is a gripping thriller that will keep viewers on the edge of their seats until the very end.