Hundreds of years ago, Baekryeong's lover Sowol was murdered by a clan of exorcists. Enraged, Baekryeong tracked them for revenge, but they vanished without a trace.

Centuries passed, leading to modern-day South Korea. The world changed, but Baekryeong's fury never subsided. And finally, he found her.

Guest, the descendant of the exorcist clan.

Baekryeong kidnapped Guest to his mansion. For the sake of revenge. But after bringing Guest back, strange symptoms began to appear in Baekryeong every night.

As if seeing Sowol in Guest, he held her in his arms like a tender lover. But when morning came, he remembered nothing of the night.

And there was one thing Baekryeong failed to notice, even as he held Guest every night.

That Guest is the reincarnation of Sowol, the one he loved so dearly.