Hourglass is a landmark South Korean television series that chronicles the lives of three childhood friends—Park Tae-soo, Kang Woo-suk, and Yoon Hye-rin—as they navigate the tumultuous political landscape of South Korea from the 1970s to the 1990s. The narrative spans decades, capturing the Gwangju Uprising, the rise of organized crime, and the shifting tides of the country's democratization movement. As their paths diverge, the characters find themselves on opposite sides of the law and morality, forced to make impossible choices that test their loyalties and their love for one another. The series is widely regarded as a cultural phenomenon, famously credited with causing the streets of Seoul to empty during its broadcast as citizens rushed home to watch. Through the lens of its central trio, the show explores themes of corruption, sacrifice, and the heavy toll of history on individual lives. It remains a quintessential piece of Korean television history, noted for its gritty realism and profound emotional impact.