Synopsis Bong-Soon (Park Bo-Young) was born with superhuman-like strength. Her strength is hereditary and passed along only to the women in her family. Her dream is to create a video game with herself as the main character. One day, Bong-Soon helps out a bus driver who is being attacked by a thug. Soon, a small mob of thugs attacks Bong-Soon, but she is easily able to wipe the floor with them. During this time, Min-Hyuk (Park Hyung-Sik) drives up to the scene of Bong-Soon beating up the group of thugs. Min-Hyuk is the CEO of video gaming company Ainsoft. He has recently received anonymous threats and even followed by an unknown person. Min-Hyuk believes Bong-Soon would make a great bodyguard with her amazing strength. Besides offering Bong-Soon high pay, he even offers her the chance of working in the planning department of his gaming company if she does well.
Meanwhile, crimes against women take place in the neighborhood where Bong-Soon lives. Detective Kook-Doo (Ji Soo) also lives in the same neighborhood. They have been friends since they were kids. Bong-Soon is also madly in love with him, but he has a girlfriend. Kook-Doo tries to solve the case and Bong-Soon and Min-Hyuk are pulled in.