Jang Jae Yeol is a famous mystery novelist and popular radio DJ with a prickly personality. After meeting psychiatrist Ji Hae Soo when they both serve on a talk show panel delving into the criminal mind, they instantly rub each other the wrong way. But when Jae Yeol’s girlfriend plagiarizes his work, forcing him to lie low until the media storm blows over and he can prove his innocence, he unexpectedly becomes Hae Soo’s roommate. Jae Yeol moves into a home that he owns that is being rented by Hae Soo; Jo Dong Min, another psychiatrist and Hae Soo’s senior colleague; and Park Soo Kwang, a young man with Tourette syndrome. As Jae Yeol and Hae Soo’s personalities clash, they help each other heal from their own deep-rooted emotional scars.