Former top hitman Adrian plans to retrieve his mother’s group. He signs a contractual marriage with playboy Tristan at the old man’s request. They clash at first but fall for each other as they get along. The greedy stepmother, vicious stepsister and cowardly father plot to seize the business. The pair team up to expose all schemes. They heal and protect each other amid family and corporate fights, defeat all villains, and gain sincere love beyond the transactional bond.