Summer of 1996 Amateur photographer Ji-hwan chases after new customers, Gyung-hee and Soo-in, as they leave the cafe where he works.

He leaves and quickly returns holding a clock over his face with a note saying he has wound back time so his declaration of love never happened.

However, the cafe owner congratulates the other two on having found love and that hurts Gyung-hee so she fights with a confused Soo-in.

Soo-in tells Ji-hwan about her first love a boy with whom she spent a long time at hospital who kept her spirits up.

Soo-in sings a love song about the three of them and leaves early asking Ji-hwan to walk with her.

Late autumn or winter 1996 Ji-hwan has not seen his friends for months and he is chided by his boss for not getting their contact details despite all the time they spent together.

(A brief flashback shows Gyung-hee tending to his hand in his bedroom while he sleeps, kissing him, then leaving.)

2001 Ji-hwan opens yet another handmade envelope containing only a black and white photo with no sender information.

Ji-hwan goes to the small town where the envelopes are postmarked but the postman denies any knowledge of the sender.

It contains the sealed letter Soo-in wrote on her deathbed, saying she thinks she will be dying soon and giving him advice on how to date Gyung-hee.

(In the flashback showing the letter being written, Soo-in draws a mark on her father's ear to match Ji-hwan's so that her dad will look more handsome.)

The camera pans to the beautiful blue sky, her voiceover says that she will be seeing Soo-in soon, "Goodbye Ji-hwan.