Ancient Korea, 1506. The tyrannical King Yeonsan-gun of Joseon is overthrown by his half-brother Jung-jong, whose reign begins with a blood bath. Over the years, traitors plot against him, sinking the kingdom into chaos. In 1528, frightened rumors come to royal palace, regarding a mysterious creature, known as Monstrum by the peasants.
A cold-blooded debt collector who never fails to get what he wants meets the beautiful yet mysterious ex-impostor whose every word is nothing but a lie. She has the key to save his life but he discovers that she only puts him into a deeper trouble. Time is running out and he needs to get it done while his heart still beats.
When his client suddenly confesses to murder in open court, a hotshot attorney embarks on a search for truth to redeem his ruined reputation.
