Frank (Kevin Costner) is the bodyguard of the former president. He has a strong sense of responsibility, a clear distinction between public and private affairs, and never has feelings with his employer. But the singer Rachel (Whitney Houston) broke his creed. Rachel is a charming female singer, and countless people are willing to be her slaves. One day she received an anonymous letter threatening to kill her. Rachel had no choice but to ask Frank to be her bodyguard. Although the two did not know each other before, Frank was conquered by Rachel's charm during their relationship, and the two fell in love. However, professional ethics and reason made Frank self-controlled. He believed that Rachel was his employer, and his first priority was to protect her safety. He deliberately kept a certain distance from Rachel, which broke Rachel's heart. When she doubted Frank's true feelings, Frank gave her a firm answer.