Crazy Love follows the story of Noh Go-jin, the narcissistic and brilliant CEO of GOTOP Education, who is the top math instructor in the country. Despite his success, he is a cold-hearted man who receives a death threat. To survive, he pretends to have amnesia when he becomes the target of a murder plot. Meanwhile, Lee Shin-ah is his quiet, diligent, and overlooked secretary who has worked for him for a year, only to discover she has been diagnosed with a terminal illness with little time left to live. When Shin-ah discovers Go-jin's predicament, she decides to take revenge on her boss for his mistreatment by pretending to be his fiancée. As their lives become inextricably linked through deception and mutual desperation, the two embark on a chaotic, unpredictable, and surprisingly romantic journey. The series explores themes of redemption, hidden trauma, and the transformative power of love amidst a backdrop of corporate intrigue and dark humor.