Warm It Was That Winter

The film follows Su-ji and her brother Su-cheol as they navigate life after losing their parents during the Korean War. They move in with their maternal grandparents, but Su-ji's life takes a turn when she accidentally loses her younger sister, Oh-mok. As time goes on, Su-ji's success allows her to enter high society, yet she remains haunted by her guilt over Oh-mok's disappearance.

Su-ji dedicates herself to charity work in hopes of finding Oh-mok. When they finally reunite in an orphanage, Su-ji's lack of proof leads her to turn away from Oh-mok. The story continues to delve into the struggles faced by Oh-mok as she marries Il-hwan and endures a hard life. Ultimately, the film portrays the emotional journey of Su-ji as she comes to realize the truth about her sister, culminating in a poignant conclusion.