"Il Mare" is the name of a seafront house where two lovers reside in at two different times. Sung-hyun in 1997 receives a strange letter one day, reminding him to be careful of the snowstorm in 1998. But it is posted in the year 1999. Time travels backward again when Eun-joo sends him a letter of request, asking him to look for her lost cassette recorder at the train station where Sung-hyun finally gets a glimpse of her.
