Inspector Yang Si Ohn wakes up from her six-year coma with the ability to see ghosts. Still unsure of how to deal with such trauma, she finds herself pulled into the suicide case of a high school student.

Si Ohn and Gun Woo's jobs are on the line after investigating the suicide case without proper permission. As much as she tries to return to a normal life, the ghosts won't leave Si Ohn alone.

When the sky begins raining blood, Si Ohn is led to a new case involving Korean-Chinese immigrants and Hyung Joon. She and Gun Woo must grapple with the consequences of their kiss

Si Ohn believes that the female ghost she's seeing is Prosecutor Park Woong Joon's fiancee, and begins to suspect the cold-hearted lawyer. Gun Woo transfers to the joint investigation team to assist in this case

A drunken night out with Gun Woo leads to Si Ohn finding a ghostly case close to home - one that involves Gun Woo's father.

The Lost and Found Division, along with the other sections, go on a team building retreat in the countryside. Si Ohn encounters the ghost of Lee Hyung Joon, but keeps his presence a secret from Gun Woo.