Serena Vienn Delacroixvern is the spoiled heiress of Delacroixvern Family. Trouble maker, hot tempered and expensive. She always makes a mess that always ends up in the newspaper and news causing her father who is the President to be angry. She is the only girl and the youngest child of the President. She is also the next heir of their family. Clevion Slater Servantez is a cold-hearted bodyguard. Bodyguard in the morning, assassin/agent at night. He was called the No 1 Agent because of his fighting skills and having completed many missions. One day, the President unexpectedly hired him to be the bodyguard of his son's heir. He immediately accepted it and became the bodyguard of the heir of the Delacroixvern family. What if they fall inlove with each other?