Within the glittering halls of the noble house of Nacht, an illusion shimmers. Everyone sees Lorena as the purest, kindest soul, a beacon of sweetness that draws all hearts. Her adoptive sister, Sienna, believed it more than anyone, convinced of the genuine warmth radiating from the person she cherished most in the world. This perfect family portrait, however, hides a festering secret, a venomous truth waiting to unravel.

Until one terrifying moment, Lorena’s loving facade shatters as she attempts to murder Sienna. The betrayal cuts deeper than any blade, revealing a profound hatred Sienna never imagined. Desperate to escape a life poisoned by such malice, Sienna seeks oblivion with a powerful magic potion, only to find herself flung back through time. Armed with devastating memories and a fierce resolve for survival, she vows to rewrite her tragic fate. But as her past rewinds, Sienna discovers a chilling twist: Lorena, the sister who tormented her, is nowhere to be found. How can she outwit a killer who has seemingly vanished from existence?

Also known as: 모두가 사랑한 내 언니가 사라진 세상.