Seo-woo Eun

Soon after Ji-won gets a new cell phone, her friend's young daughter, Yeong-ju, puts it to her ear and immediately begins screaming in terror... (imdb)

After unfairly losing his title, Tae Kwon Do World Champ Kim Seung-Hyun (Lee Dong-jun) winds up cage fighting in Vegas. At the same time, his wife dies while giving birth to a girl in Korea, so Kim returns to raise his daughter and finds works as a cop. Years later, he loses his job and returns to illegal fighting -- but this time, he's blackmailed, his daughter's life is at stake, and a woman from his past reappears.

A modern day adaptation of Cinderella with a twist as our Cinderella, Goo Hyo Sun, is loved by everyone whereas her stepsister, Eun Jo, has a dark past and struggles with the fact that her mother starts to care more for Hyo Sun than her. (imdb)