Joon-seok, a successful author, and Deok-hee, an art instructor look like a normal couple who lead happy lives, but their biggest problem is Deok-hee's selective amnesia. One day, Joon-seok goes on a journey to prep his new novel and tragically dies in an accident. Overwhelmed with sorrow, Deok-hee heads to the same place and as she traces his journey, she faces the unexpected truth.