Eun-joo, a young woman living in 1999, receives a letter from Unju, who lives two years in the past. Extraordinarily, the two manage to maintain a correspondence across the flow of time and space, and gradually fall in love. But how do these would-be lovers surmount the obstacle of meeting face-to-face? This Korean romance was remade for American audiences as The Lake House, starring Keanu Reeves and Sandra Bullock.