Lee Gang-Doo dreamed of becoming a soccer player, but an accident ended those dreams. His father died in the accident and he broke his leg. Lee Gang-Doo spent 3 years in rehab. Now, he doesn't have anything and just wastes his days. Lee Gang-Doo then meets Ha Moon-Soo. Ha Moon-Soo makes architecture models. Ha Moon-Soo also endured an accident that killed her younger sibling. She has suffered from guilt that she survived. She has lived her life earnestly, while suppressing her feelings. After meeting Lee Gang-Doo, Ha Moon-Soo begins to express her hidden feelings.

Chun Jae In is an elite detective with a genius IQ, who guided by only facts, logic, and numbers. Meanwhile, Kim Dan is a rookie detective who can see ghosts. They work together to uncover a conspiracy involving a powerful organization.

In his quest for a bride to break his immortal curse, a 939-year-old guardian of souls meets a grim reaper and a sprightly student with a tragic past.