Do Bong-Soon(Park Bo-young), was born with superhuman strength—a gift that was passed down to all the women in her family. She always dreamt of creating a video game with her as the main character, which is why she was over the moon when she landed a job as the CEO’s bodyguard at Ainsoft, a popular gaming company. CEO Ahn Min-Hyuk (Park Hyung Sik) has been receiving anonymous threats because he’s next in line to take over his father’s other company. Meanwhile, Bong-Soon’s neighborhood was tormented by a series of kidnappings. One of the lead investigators is Bong-Soon’s childhood friend, Guk-Doo (Ji Soo), who she is secretly in love with. Eventually, the three join forces to solve these crimes, which eventually led to a shift in their relationship.