Lily Green is an ordinary employee at a New York advertising agency. Recently graduated from college, she struggles to establish herself in the big city through hard work and perseverance. Her life is simple and busy, and she dreams of one day changing her fate. One day, at a friend's bar party, she accidentally saves a drunken man. To her surprise, the man she helped is none other than Nathan Carter, the most famous CEO in New York. Nathan Carter is the young CEO of Carter Enterprises, a multinational corporation. He took control of the business empire at a young age and is known for his powerful leadership style and mysterious personal life, making him a media and public focus. Cold and indifferent towards women, his career is the most important thing in his life — until he meets Lily. Nathan falls for Lily at first sight. Though she is just an ordinary employee, he decides to bring her into his carefully crafted glamorous world. From that moment on, Lily’s life changes dramatically. She not only faces Nathan’s cold, domineering exterior but also discovers the complex depths of his heart. As their relationship deepens, Lily quickly realizes that Nathan’s world is far from simple. Power struggles and corporate rivalries bring immense pressure into her life, and she grows through the relationship, learning how to balance love and career while making difficult decisions.

A sudden misfortune befalls the heroine’s family, and she is desperate for a huge sum of money for medical treatment. With no other way out, she enters into a one-year contractual marriage with the city’s most mysterious and cold-hearted top tycoon. They pretend to be a loving couple in public, while keeping their private lives completely separate from each other. She thinks this is merely a transaction for mutual benefit, void of affection and true feelings. Yet as they spend day and night together, the icy CEO makes endless exceptions for her, shielding her from harm, showing her unique favor, and gradually falling deeply in love. Rainy night encounters, unexpected heart flutters, wealthy family intrigues, rival suitor schemes, hidden family secrets, identity reversals, the end of the contract… What begins as a deal blooms into mutual devotion, and they finally embrace their everlasting true love.