Soul

Cheerful high school girl Ha-na (Lim Ju-eun) is always the first to come out and protect her introverted twin sister Doo-na (Park Ji-yeon), who has a slight limp. After Doo-na passes away in a fire, Ha-na finds that her body no longer completely belongs to herself. Doo-na's angry spirit now lives in Ha-na, giving her special powers and monstrous strength. Genius criminal psychologist Shin Ryu (Lee Seo-jin) is an expert profiler who is determined to see justice served. When he learns about Ha-na's abilities, he uses her powers to eliminate criminals that are above the law, and to plan his revenge on the man (Kim Kap-soo) who helped his family's killer go free. [About] Soul is a 2009 South Korean crime horror television drama series, starring Lim Ju-eun and Lee Seo-jin. It is about a high school girl possessed by spirits and the criminal profiler who exploits her powers in his quest for justice, played by Im and Lee respectively. It aired on MBC from August 5 to September 3, 2009 on Wednesdays and Thursdays at 21:55 for 10 episodes.  [Source: Wikipedia]