This drama is based on webcomic “Naeil” by “Llama/ 라마”. which was published from 2017-May-20 via Naver.
Choi Joon Woong (Ro Woon) a young job seeker, who can’t get a job and through an accidental accident, meets angels of death Koo Ryun (Kim Hee Sun) who are on a special mission of suicide prevention, and works with them as the youngest contract worker in the crisis management team of death angels.