The female lead accepted a high-paying live-in nanny job to make a living, only to discover that her employer was the male lead, who had a notorious reputation. He then proposed a "contract marriage" with an even higher salary, asking her to become the mother of his child. During their time living together, the female lead uncovered the gentleness and responsibility hidden beneath the male lead's cold exterior, while the male lead had long recognized her as his high school sweetheart, from whom he had been separated due to an accident. The male lead silently protected her, discreetly eliminating threats from the child's biological mother and overcoming opposition from his family. In the end, they resolved the misunderstandings of the past, overcame numerous hardships, and rekindled their romance.
