He quickly goes to his grandfather's but finds him well. It turns out he feigned illness to talk to Su-ho. Su-eun arrives with Su-ho's bag. Su-ho's grandfather shares his story. When he was young, Su-ho's grandfather joined the army. He was separated from his first love, Soon-im. He left her a necklace to remember him by. Years passed and he became an undertaker. He prepared a funeral for Soon-im's husband. They could not even say a word to each other and soon he married another woman, Su-ho's grandmother. This story makes Su-ho realize that he loves Su-eun and wants to be with her. He leaves a message for Su-eun expressing his feelings, unaware that she is behind him until she replies, "Me too." From that day on, Su-ho and Su-eun are officially a couple. Su-ho's friends propose an overnight stay on Fog Island. As Su-ho and Su-eun arrive together at the pier, he finds out that his friends tricked him so he and Su-eun would have some time alone. On the island their love deepens, and they share their first kiss. The next day, Su-eun faints. Su-ho rushes her to the hospital, visiting her every day. She turns out to be suffering from terminal leukemia. Her last wish is to return to their island. Soon-im also had a last wish before she died: to be reunited with Su-ho's grandfather. He prepared her funeral and was reunited with his first love, who he had loved for 50 years. While Su-ho is visiting the hospital Su-eun expresses her wish, and he shows her two ferry tickets. However, a typhoon prevents the ferries from running. Su-ho desperately pleads with the authorities to let them travel. While they argue, Su-eun collapses. In the present, Su-ho returns to Fog Island and finds Su-eun's bag. Her diary entry reveals that she had planted seeds on the hill during their visit. The flowers will be her gift to him. Su-ho goes to the hill, finding it covered with purple flowers. Cast Song Hye-kyo as Bae Su-eun Cha Tae-hyun as Kim Su-ho Kim Hae-sook as Su-ho's mother Lee Soon-jae as Kim Man-geum, Su-ho's grandfather Song Chang-eui as Park Jong-goo, Su-ho's friend Park Hyo-jun as Oh Sung-jin, Su-ho's friend Kim Young-joon as Kim Hye-sung, Su-ho's friend Kim Shin-young as Su-ho's sister Moon Won-joo as Young-goo, judo captain Han Myeong-ku as Su-eun's father Moon Jung-hee as Soon-im / Soon-im's daughter