Vanishing (2014)

One night in Seoul. Two girls from totally different background meet. A contracted Japanese killer Mai and a Hostess Soyoung accidentally bump into each others lives and they take on an unexpected journey trying to find Soyoung's missing boyfriend who vanished without a reason. As they spend the night trying to find the clue to Soyoung's boyfriend they learn how Soyoung neglected her life and never loved anyone. Mai sees a glimpse of Soyoung's life and reflects her own and gradually sympathize. Mai confesses Soyoung that Mai is meeting her dying Korean father. They learn to care for someone else, the feeling they have abandoned long ago. They learn to love and appreciate life not knowing it won't last long before it vanishes again.