Shi Hwa Mong

Shi, Hwa, and Mong are sisters, and they have something in common: they are triplets. After losing their mother, they are each entrusted to a different family. Thus, Shi lives in New York; Mong in Japan and Hwa remains in Korea. Nine years later Shi comes to find all the three in Korea... What became of their father? And why were they separated?