A woman attempting to reboot her life returns to Korea and becomes entangled with her childhood friend — with whom she shares a complicated history.

After being jobless for three years, Choi Joon Woong decides to take his own life and goes to a bridge to jump off of it. However, he finds someone else there who is also about to jump off the bridge and gets into a fight trying to save them. In the fight, the two of them accidentally fall off the bridge. A crisis management team run by grim reapers belatedly arrives at the scene, and Choi Joon Woong ends up falling into a three-year coma with his soul having escaped his body due to an error caused by the grim reapers. Now a soul who is half alive and half dead, he unexpectedly gets a job at the crisis management team at the most prominent company of grim reapers in the underworld. Gu Ryeon is the leader of the crisis management team . His job at the team involves taking special care of people with a high risk of suicide and helping them want to continue living.

A mysterious case happened, involving a serial killer with a claw hammer. Detective Dong Baek and Profiler Han Sun-mi separately chased the culprit.

A romantic comedy that depicts the daily lives of 30-year-old best friends Lim Jin-joo, Lee Eun-jung and Hwang Han-joo.