One Room

Lee Do-Yoon, an office worker who has risked his life to work for a successful life. Just as he was starting to get on track and achieve the success he had dreamed of, he let go of the tension, drank too much, and fell asleep with the film cut out. When he woke up in his studio apartment, he found the dismembered corpse of a woman. All evidence points to him as the culprit. Instead of succeeding, Do-Yoon is accused of being a criminal and begins to pursue the truth of the case in order to clear himself of the charges...

(Source: Naver, translated)