Ha Ji-an, the author of the bestselling horror novel The Night Series, one day obtains a cursed keyboard that brings anything she writes to life.

As a result, Ju U-geum, the serial killer from her novel, suddenly appears in the real world.

But contrary to what she expected, he doesn’t kill Ji-an. Instead, he gently confesses his feelings.

“I love you, Ji-an.”

The problem is, Ji-an knows better than anyone that Ju U-geum is a monster capable of killing even the person he loves.

Desperate to survive, she tries to rewrite the events of her novel. But the most important sentence is erased by an unknown force.

Can Ji-an survive the serial killer she created herself?