Gloria

After their parents were killed in a car accident, Na Jin-jin (Bae Doona) has lived with her mentally handicapped older sister Na Jin-joo (Oh Hyun-kyung), whom she has supported from a young age. Jin-jin barely ekes out a living juggling a series of dead-end part-time jobs, including delivering newspapers and running a nightclub coat check. One day, the nightclub's regular singer doesn't show up and when Jin-jin is asked to fill in, she performs an impromptu version of Laura Branigan's "Gloria." Jin-jin becomes consumed with the idea of becoming a nightclub singer and sees it as her only hope to escape her humdrum life, saying that she only feels alive when she's onstage. Jin-jin grew up with Ha Dong-ah (Lee Chun-hee), who has remained her loyal friend through everything, as he himself raises his young nephew. But Dong-ah, a gifted fighter, turns to a life in the mob. Lee Kang-suk (Seo Ji-seok), the illegitimate son of a wealthy family and president of a record label, begins pursuing Jin-jin, while suicidal ex-ballet dancer Jung Yoon-seo (So Yi-hyun) catches Dong-ah's eye. [About] Gloria is a South Korean television series starring Bae Doona, Lee Chun-hee, Seo Ji-seok, So Yi-hyun, Oh Hyun-kyung and Lee Jong-won in a tale of romance, survival, overcoming poverty and adversity, and making your dreams come true. It aired on MBC from July 31, 2010 to January 30, 2011 on Saturdays and Sundays at 20:40 for 50 episodes. [Source: Wikipedia]