[4][5] The series is based on the screenplay by Moon Hyun-kyung which is the grand prize winner in Broadcasting Content Promotion Foundation (BCPF)'s 10th Find the Desert's Shooting Star Screenplay Competition, held in 2018.

[6] Koo Se Ra (Nana), who has lived all 29 years of her life in Mawon-gu, is nothing but an underqualified struggler with a poor financial background.

On one hand, this over-passionate, self-proclaimed Tax Guardian never lets a single wrongdoing slip through her until it is filed and settled as a civil complaint.

However, because of her nosy nature and her tendency to lose temper over unrighteousness, she gets fired from an internship, from a contract position, and even from an outsourced job, to name a few from the list of her former employers.

Although not intended, she finds herself gradually turning into a professional resignee and decides that it's time for a change.