La pequeña Seung-jae se queda despierta toda la noche y le escribe cartas a So-hee, pretendiendo ser su padre en Marte. Dejando atrás el corazón inocente de Seung-jae, So-hee se va a una gran ciudad. Ambos adultos, Seung-jae es un cartero que escribe cartas a la abuela de So-hee, las cartas que nunca llegaron de So-hee. El corazón de So-hee se endurece después de las dificultades de la vida y ella regresa a su ciudad natal y el corazón de Seung-jae se hincha de nuevo al verla de nuevo ...
Two friends - Min-gyu, a wild-animal vet, and Eun-hae, a fashion photographer - commiserate with each other when each realizes that the person they love is no longer in love with them. In anger, Eun-hae smashes up her boyfriend's car; in frustration, Min-gyu breaks glasses and carves up a spider. Min-gyu and Eun-hae each urge the other to be calm, to move on, to forget about it. Good advice, if only they could take it. "Why do humans need love?," these friends ask each other. Can jealousy, anger, and desire for revenge lead two jilted lovers to embrace what they have? Will someone dream of a giraffe?
