In the year 1999, a young woman leaves her quaint seaside house and returns to the city, leaving in the mailbox a card for the next owner, with instructions to forward any mail of hers to the new address. In the year 1997, a jaded young architect moves into the same house--and finds the letter. His reply, which he slips into the mailbox, finds its way to her, beginning a parallel-time love story separated by a span of two years.
In the spring of 1999, a group of old friends gather to celebrate their 20 year reunion. Among the group is Yeong-ho, a cold, unhappy man, whose demeanor puts a damper on the festivities. The seriousness of Yeong-ho's depression becomes apparent when he climbs a railroad bridge and looks like he might jump. At this crucial moment, memories of seven crucial episodes from Yeong-ho's past flood his mind.
A sexagenarian South Korean woman enrolls in a poetry class as she grapples with her faltering memory and her grandson's appalling wrongdoing.
A young man released from prison visits the widow of the man he killed drunk-driving and becomes infatuated with his cerebral palsy-stricken daughter.
Actor Gyung-soo is passed over and decides to leave Seoul and visit a friend. His friend tells him that the Turning Gate legend foreshadows future events. During his visit, Gyung-soo meets Myung-sook, who quickly falls for him. After a night of passion, he boards the train back to Seoul and meets a married woman who claims to know him. Gyung-soo thinks he may love her, but perhaps he's chosen the wrong woman.
As the first snow falls in Seoul, two old friends reunite; one is a successful college professor, and the other, a struggling filmmaker recently returned from the United States. After their reminiscences, they finally decide to go in search of the young woman each had romanced years earlier.
