He is an audio technician, an unromantic man looking for the most romantic sound on earth. In an unexpected encounter, he comes across two of the most romantic things---- a beautiful recreational vehicle and its beautiful owner.The girl loves to travel the world and the boy hopes to find the most soul-soothing sound in nature. Pursuing their dreams, they decide to travel together in the recreational vehicle.As they journey through picturesque sites and scenes, the girl helps him to regain his sensitivity and the boy teaches her how to value life. Their doubt for each other starts turning into love.Unfortunately, as he falls more deeply for her, the boy discovers that the girl is at the end of her life. She dreams of finding a legendary tree house where she can leave the world overlooking her hometown from afar. The boy decides to accompany her till her last days.But he never gets a chance to see her in her last moments. In order to leave him with the most beautiful memory, the girl rather leaves him quietly without saying good-bye.Devastated, the boy goes back home and hibernates for months. In the depth of his darkest time, the girl suddenly reappears before him, with a brand new look and attitude. She seems to be a totally different girl!He cannot believe nor can he accept it. What on earth has happened?