Struggling to support her poor family and study to become a teacher, Go Eun Nim makes a difficult choice to earn the money she desperately needs. She agrees to work as a surrogate mother for an infertile couple. But it turns out the wife is hiding the fact from her husband, who happens to be having an affair with a woman in his office. But things get complicated when Eun Nim falls in love with the husband’s younger brother. How can Eun Nim find time for love when her body is not her own?