Yu-na, a level-headed and rational insurance claim adjuster, investigates a questionable death by falling with suspicions of suicide. During her investigation, she meets Soon-kyu, the deceased's elusive guardian. As Yu-na probes further, she begins to question whether Soon-kyu is a mentor or a conman, and her carefully guarded inner world starts to shake.
Yu-na
Sun-gyu
Mother
Bo-gyeong
Hyun-sub
Manager
Factory manager
Nam-su
Ga-eun
Do-jun
CEO
Jun-sang
Doctor
Jung-soo
Su-jin
Worker
CEO
Detective