On the wedding day of Navia, a human herbalist, she is forcibly abducted and married by Zeviras, the ruthless Demon King. Navia puts up a fierce resistance, unaware that her fiancé Elian is a hypocritical, gambling-addicted coward who colludes with rebel forces. Under the Demon King’s meticulous care and gentle, devoted courtship, Navia gradually finds her heart softening toward him. But unexpectedly, Elian brutally murders Navia’s father and frames the Demon King for the crime. Blinded by grief and rage, Navia uses a demon-slaying crossbow to pierce the Demon King’s heart core— which he deliberately exposes to her. When the bloody truth comes to light, can a guilt-stricken Navia awaken the dying Demon King with a kiss of true love, and make her deceitful ex-fiancé pay the ultimate price?
