Seong-hui (Ju Jeung-nyeo), wife of diplomat Baek Sang-ho(No Neung-geol), shoots at Yeong-suk (Choe Eun-hui) and is arrested by the police. The media report it is prompted by a love triangle and a prosecutor (Park Gyeong-ju) starts to interrogate Yeong-suk. Misunderstood that his wife has cheated him, Baek Sang-ho tries to divorce and Yeong-suk begins to tell him and the prosecutor about her past. When Yeong-suk was dating a loser of a guy named Sang-geun, she became pregnant, and asked for the advice of her half-sister Seong-hui. Yeong-suk ended up giving her child to Seong-hui, who was unable to have children of her own. Seong-hui pretended to be the true mother of the child, and Sang-ho, absent when the clandestine exchange was made, has no idea of the truth. A few years later, Sang-geun returns from Japan and demand one million won from Yeong-suk. She asks Seong-hui for help and Seong-hui promises to have the money ready by selling her jewelries. Since then Yeong-suk begins to frequently drop by Seong-hui's home again and she naturally comes to terms with her son Sik-i. Yeong-suk regrets having given her son and demands that her baby be returned to her, but Seong-hui stubbornly refuses. Yeong-suk then threatens to tell Sang-ho the truth, and heads for his workplace to do so. Seong-hui follows her and fires a shot at her. After Yeong-suk tells the prosecutor the truth, she pleads with him to release her half-sister, and Seong-hui is set free. She finally permits Yeong-