In the elite world of Cheongdam-dong, a woman desperate to become a mother discovers a heartbreaking web of lies spun by her husband and in-laws. As her life unravels, she finds comfort in a building designer—unaware he’s the boy she once saved years ago. Meanwhile, her birth mother, now a wealthy woman, searches for the daughter who was kidnapped as a baby. But fate complicates things further when her stepsister sees her as a rival for the man they both love.