A stranger, a foreign country, just the two of them for 72 hours. Can love begin? Chaewon and Sangyeol, who might never have met otherwise, embarked on a three-day road trip to the northernmost part of Hokkaido last summer, neither knowing each other's age or profession. After their dreamlike 72-hour journey on a hot summer night, they return to their daily lives. The two meet again in Seoul, standing at the cusp of winter.