A pitiless demon becomes powerless after getting entangled with an icy heiress, who may hold the key to his lost abilities — and his heart.
Episode 1 - Living in the Mist
An accidental date with Jeong Gu-won leaves Do Do-hee feeling flustered. She later becomes a victim of an attack - where a rescue requires a contract.
Episode 2 ∙ Everyone Has a Demon in Their Heart
Gu-won inexplicably loses his power - and finds that Do-hee might be the key to regaining it. But his efforts to take back his abilities backfire.
Episode 3 ∙ Joining Hands With a Demon
After another attack, Do-hee asks Gu-won to be her guard - even after his admission as a demon. Do-hee finds the loss of someone close suspicious.
Episode 4 ∙ Sweet but Dangerous
Do-hee proposes to Gu-won, but he refuses. She later recruits him to investigate Ju Cheon-suk's death, but he faces an unexpected power blockage.
Episode 5 ∙ Only You
After a dramatic rescue, Gu-won and Do-hee begin having complex feelings for each other. Do-hee later tries to find a man to marry - frustrating Gu-won.
Episode 6 ∙ Into the Wheel of Fortune
After Gu-won saves Do-hee's life, she receives competing marriage proposals. She ends up choosing one, and finds an alarming face at her wedding.
Episode 7 ∙ Stained Relationships
Do-hee and Gu-won go through newlywed pains as they move in together. Ju Seok-hoon begins to suspect Gu-won's non-human identity.
Episode 8 ∙ The Fateful Choice
After a sudden attack on Gu-won, Do-hee rushes to save his life - and as life around her becomes more dangerous, she makes a surprising career move.
Episode 9 ∙ The Unmasked Truth
As Do-hee and Gu-won's relationship finally blossoms, Gu-won begins to experience a strange change in his powers - all amidst a larger looming threat.
Episode 10 ∙ Breaking Through the Shell
Upon discovering his fate, Gu-won tries to find another way to save himself. But just as he and Do-hee prepare their ritual, she becomes a target.
Episode 11 ∙ A Paradise of the Ominous
Gu-won finds his power restored after rescuing Do-hee from a sure death - but with side effects. With no time to waste, the two investigate the attack.
Episode 12 ∙ The Savior of Destruction
A dream of Gu-won's past life reveals his tragic connection to Do-hee. After the two hear of a death, their suspicions of the Noh family deepens.
Episode 13 ∙ The Past, the Original Sin
As Gu-won and Do-hee enjoy their bliss, he notices her unresolved trauma. The two later join Noh Suk-min for dinner, unaware of his true intentions.
Episode 14 ∙ Our Personal Hell
Gu-won comes to Do-hee's rescue after a frightening confrontation with Suk-min. But Suk-min's revelation about Cheon-suk leaves Do-hee harrowed.
Episode 15 ∙ The End of Fate
Police fails to find Suk-min's body, opening up a concerning possibility. Do-hee attempts to bury her feelings after Gu-won disappears without a trace.
Episode 16 ∙ Our Personal Heaven
Do-hee finds herself catatonic after her loss. Desperate for Gu-won's return, she makes a Christmas wish for her love - which Noh Suk-nyeo hears.
