A suit store owner reveals a mother's longstanding wish. Sang-gu is reminded of his costly promise. The trauma cleaners arrive at a bloody crime scene.

The trauma cleaners search for the loved one of a slain doctor to hand-deliver a box full of regrets, hopes and an unrealized future for two.

Sang-gu and Geu-ru try to give a proper sendoff to a doting couple who called Move to Heaven after deciding to leave the world together hand in hand.

Sang-gu begrudgingly took Kim Su-cheol under his wing 10 years ago, unaware that his mentorship would bloom into brotherhood and end in destruction.