Oh Jin-shim—better known by her stage name, Oh Yoon-seo—takes a forced break from acting after a scandal derails her career. Hoping for a comeback, she turns to a top screenwriter who agrees to help under one unusual condition. Soon after, ace lawyer Kwon Jung-rok learns that Oh Yoon-seo has been assigned to the firm as his secretary.

Jung-rok discovers that Jin-shim was not at fault for the missing documents. He apologizes, but Jin-shim is still upset and drinks too much at the welcome party. When she sees Jung-rok arrive, she loses her composure and confronts him head-on.

Jin-shim finally gets a chance to prove herself as a secretary, but her excitement quickly fades under the crushing workload. Meanwhile, Jung-rok takes on the case of a high school student accused of fraud. Jin-shim steps in to help, but the case grows more complicated as the student keeps lying.

Jin-shim joins Jung-rok on weekends to study law, but it is simply their time together that she enjoys the most. Her good mood shifts when she notices how unusually warm he is toward prosecutor Yu Yeo-reum. Meanwhile, Seung-hee, a college student being stalked, turns to Jung-rok for help. While gathering evidence, he learns that Jin-shim was once stalked too.

Jin-shim begins to realize that her time with Jung-rok is starting to mean more to her. However, when he puts Yeo-reum first again, jealousy gets the best of her. Hoping to understand Jin-shim's feelings, Jung-rok asks her directly at a company dinner. Around the same time, he takes on the case of Lim Yun-hee, who is on trial for murdering her husband.

Jung-rok and Jin-shim work late nights preparing for Lim Yun-hee's trial. One evening, they get stuck in an elevator and finally confront their feelings. When a male friend comes to pick Jin-shim up, Jung-rok feels unsettled. Later, while searching for clues at the crime scene, they come under sudden attack.