The birth of a boy born with a curse brings death to the village. Years later, Dan Hwal reencounters a mystifying woman while hunting down monsters.

Upon burying loved ones, Hwal embarks on a centuries-spanning chase for revenge. Min Sang-yeon's worst fears come true when Min Sang-un is followed home.

To settle the score for good, Hwal, Sang-un and Ho-yeol meet Eul-tae at the well. But one individual has a different plan for revenge in mind.

A hair tie left behind at a crime scene leads Hwal closer to his target. Sang-un's past catches up to her during a night shift at the cleaners.

Sang-un asks Hwal for help in avenging her family's death. Eul-tae tries to persuade the other Bulgasal into joining hands against a common enemy.

Hwal sets out to lock up Eul-tae for good. Trying to protect Sang-un from danger, Si-ho searches for a solution from her sister's past life.

As Hwal vows to do everything in his power to capture Eul-tae, Sang-un reminds him not to lose sight of who he is on his path to revenge.

To defeat a greater evil, Sang-un and Hwal agree to keep each other alive for now. Kwon Ho-yeol steps into a hairy case of déjà vu.

Hwal takes Sang-un to a village to help retrieve memories from her past life. There, a monster tells of Eul-tae's secret in her final gasps of breath.

Eul-tae invites himself into Hwal's home to look for Sang-un. Do-yun is kidnapped by a reincarnated monster seeking revenge on both Bulgasals.

Rattled by Eul-tae's remarks, Hwal seeks clarity on events that transpired a thousand years ago and how the bad blood started between him and Sang-un.

Hwal and Sang-un share conflicting memories of the past. Eul-tae channels his anger into a plan to take away everything Hwal cherishes.

Sang-un finally remembers her sister's last words — and how to kill Bulgasal. Ok Eul-tae emerges out of the shadows to destroy an ill-fated soul.

Lee Hye-seok's prediction spooks Sang-un into searching for answers about her past. Despite Hwal's warning, Ho-yeol continues to look into Eul-tae.

Seeing Hwal and Ho-yeol together stirs up a bitter memory for Eul-tae. Nam Do-yun faces a dilemma when a Bulgasal asks him to return the favor.

A backstory from a thousand years ago reveals the origin of the Bulgasals’ ill-fated connection. Sacrifice puts an end to the immortal curse.