Behind the dazzling stardom of rising actress Chu Yi lies a difficult reality: her family business is on the verge of bankruptcy, and her father is gravely ill and bedridden. Business tycoon Li Zhi'ang offers her a deal: three years of marriage in exchange for one billion to save her father. A contract binds two people who otherwise would have had nothing to do with each other. She needs his wealth to save her family, while he needs her identity to navigate the feuds of the wealthy elite.
In public, they are a loving couple, attending grand events together and smiling for the cameras. In private, they lay down three rules, live in separate rooms, and keep their lives strictly apart. She continues to shine in the entertainment world, while he rules his business empire. Though they should have remained on parallel paths, they gradually grow closer under the same roof.
He resolves the crises in her career and secretly brings in experts from around the world to treat her father. When his family turns against him, she stands by his side and uses her wits to defuse the crisis. From mutual suspicion to growing affection, from a contract marriage to irresistible passion, their guarded hearts slowly open to each other.
But the world of the wealthy is treacherous, and undercurrents swirl within the Li family. In the entertainment industry, danger lurks at every turn. As secrets from the past come to light, shocking rumors hit the media, and family forces try to tear them apart, can a marriage that began as a business deal withstand the test of reality?