Priest

A child dies at the ER, but then his ECG graph starts moving again. An exorcist comes to the doctor.

"The child was possessed so we exorcised him." Eun-ho's confused, but the chase for the devil's on.

"You're telling me to believe in a devil?" An inevitable alliance forms between Eun-ho and Soo-min.

Soo-min attempts an exorcism in the host's psyche, but the devil shadows over him more and more.

"Remember I warned you?" The 634 Regia is in crisis while trying to fight against the great devil.

The host has escaped from the hospital. The 634 Regia is on the chase but a poltergeist blocks them.

While a weapon to defeat the devil is unveiled, the 634 Regia has a fight after Kyung-ran's death.

Detective Koo is possessed by the devil. Someone who knows how to deal with the devil arrives.

As the devil plays cruel tricks, 634 Regia's founding member, Sister Lee, has the tables turned.

While the devil's getting stronger, an assailant approaches Soo-min. "With you, I'll go to hell."

Soo-min is puzzled to learn the assailant is his mom. Is it really his mom, or is it just the devil?

Soo-min wakes up from a dream and is confused about what happened. The desperate fight begins again.

Eun-ho and 634 Regia fall into the devil's trap, and Soo-min devises a risky strategy to fight back.

Woo-ju is back at the ER, letting out black, murky breaths. Father Moon comes up with a last resort.

The devil's terrifying whispers continue. The 634 Regia begins their deadly fight against the devil.