Delivery rider Harper is forced to marry real estate heir Conrad to pay off her father’s debt—and strike the first blow to demolish a century-old landmark at their livestreamed wedding. As the whole city calls her a traitor, she reveals her hidden identity: Vault, a top restoration master. Before the golden hammer falls, she stops the demolition, exposes an insurance fraud and short-selling scheme, and turns a contract marriage into a power-grabbing love story.