Seo Won disguised as a male secretary on behalf of her younger brother who has been injured in an accident. She works as a vice president’s secretary and is wrongly accused of being a corporate spy. So she has to work and prove her innocence. While being up to her eyes in finding out the real spy, she is gradually captivated by the vice-president, Kang Jun, who doesn’t know her true gender. Can Seo Won dispel suspicions as a spy and hide her gender?