Along with his young son, Ji-ho, Woo-jin misses his wife Soo-a, who died after promising to return a year later with the rainy season. Miraculously, they reunite with Soo-a when the rainy season comes around, but she has no memory of her husband and son whom she dearly loved.
Gary, a musician, is trapped in an unhappy relationship with his live-in lover, Dora. He becomes enthralled with a beautiful seductress who enters his dreams, and tries to control his dream-state so he can spend more and more time with her. When Gary sees his mystery woman's face on a bus billboard, he discovers she is real, and fate brings him an opportunity to meet her.
In an attempt to win back her ex-boyfriend Jack on Christmas Eve, Kate ends up ruining her blind date with Miles, a handsome guy she's been set up with. In a strange twist of fate, Kate is magically given the chance to re-live Christmas Eve twelve times!