Former master, today's servant

At a high-society banquet, a young woman collapses from a severe wound, and a blood test reveals a stunning truth: she is the illegitimate daughter of a maid, swapped at birth. The servant boy she grew up with is actually the true heir to the family fortune. He offers to save her life—on the condition that she becomes his maid. Years of hidden feelings and bitter resentment unfold between them. When an arranged marriage threatens to separate them, he proposes to her instead. Her true identity is revealed once more: she is the daughter of a billionaire. After facing down jealous rivals, poison plots, and a near-fatal rescue, he falls into a coma. She stays by his side, confessing their child and the love that began in childhood. He awakens, and together they find their way home.