Eun-nim Ko (Lee Su-Kyeong) is a young woman preparing for her teacher certification test. She comes from a poor family with her father being chronically sick. Eun-nim then comes across a chance to make money for herself and her family. She opts to become a surrogate mother for a man named Se-hun Baek (Ryu Jin). Through fate and odd luck Eun-nim meets Se-hun's younger brother, Kang-ho Baek (Jeong Kyeo-Woon) and they fall in love. Meanwhile, Kang-ho Baek learns that he is the son of a mistress. His real birth mother is somewhere else and Kang-ho Baek realizes now why his mother always favored his older brother ...

Eun-nim Ko (Lee Su-Kyeong) is a young woman preparing for her teacher certification test. She comes from a poor family with her father being chronically sick. Eun-nim then comes across a chance to make money for herself and her family. She opts to become a surrogate mother for a man named Se-hun Baek (Ryu Jin). Through fate and odd luck Eun-nim meets Se-hun's younger brother, Kang-ho Baek (Jeong Kyeo-Woon) and they fall in love. Meanwhile, Kang-ho Baek learns that he is the son of a mistress. His real birth mother is somewhere else and Kang-ho Baek realizes now why his mother always favored his older brother ... [ Contract ]