Ari always wears a yellow raincoat because she must keep her "curse" from spreading. One rainy day, Ari shares her raincoat with her best friend Jo Kang. Thenext day, Jo Kang gets measles and Ari mysteriously disappears!

Ten years later, Jo Kang is now in high school. Completely out of t eblue, Ari contacts him and asks to meet again. They spend happy days together and Ari kisses Jo Kang. The next day Ari disappears again!

Eight years pass, Jo Kang is now working as a teller in a bank. One day Ari suddenly appears and tells Jo Kang she is leaving for America...

What is the truth behind Ari's disappearance? Can Jo Kang track down his love?