 Hee-jin had suddenly left Korea years ago, right after a car accident that had killed Jin-heon's older brother, his sister-in-law and a motorcyclist, and left Jin-heon (who was driving) seriously injured.Though Jin-heon's leg eventually recovered, emotional scars remained, a mixture of sorrow, guilt, and anger at Hee-jin's abandonment.But what he didn't know was that Hee-jin had been diagnosed at the time with stomach cancer, and she'd broken up with him because she didn't want to add to the tragedy he was already experiencing.