Woo Jin takes care of his son Ji Ho alone after his wife Soo A passed away. Before she passed away, she promised she would be back on a rainy day one year later. One year later, Soo A appears again, but she does not remember anything.
Woo Jin merawat putranya Ji Ho sendirian setelah istrinya, Soo A meninggal. Sebelum dia meninggal, dia berjanji akan kembali pada saat hari hujan satu tahun kemudian. Satu tahun kemudian, Soo A muncul lagi, tetapi dia tidak ingat apa-apa.
