Tae Joo, a murderer serving a life sentence in prison, is given a temporary release to save the life of a seriously ill young girl, Se Hee, who suffers from Wilson's disease and desperately needs a liver transplant. Se Hee is the daughter of Yeong Woo, an old friend of Tae Joo's who is now a police officer. Upon discovering that Se Hee's now-deceased mother was his ex-wife, Tae Joo realizes that he is, in fact, her biological father, and does everything he can to try and save her life. (Source: Wikipedia)