Once every year, Haneul and Minseok will come back home. They ride the train that will take them away from their busy life in Seoul back to when it was she was the princess and he was the knight in shining tin can.

Once every year, they take that train.

Once every year, they go on a journey.

Once every year, they go back in time.

But never once in his life will he ever stop loving that girl with jade green eyes…