"On a stormy night, Cecilia, the true Stone family heiress, flees from being sacrificed by her adopted sister to the perverted Harlan. She crashes off a cliff and stumbles into Dusk Manor, the estate of Lucian, the underground king of North America.
Lucian spares her life but claims she belongs to him, locking her in a gilded cage. Cecilia pretends to be blind and acts fragile to survive, yet flinches when his finger brushes the maple birthmark on her shoulder.
While hiding behind her blind persona, she shocks high society under the alias “Disciple of Master X”, transforming from prey into a predator.
Lucian has long seen through her disguise but plays along. He eliminates hostile forces within his clan and crushes the entire Stone family for her. At an auction, he outbids everyone extravagantly for her. Back at the manor, he cups her chin, strokes her feigned blind eyes and teases her for her flawless act, ordering an investigation into the scar code “Black Screen” on her back.
Later, Harlan’s armed siege and the fake heiress Selina’s conspiracy are both ruthlessly dismantled by Lucian. The truth unfolds: Cecilia is the lone survivor of a deadly fire years ago.
In the end, Lucian removes all surveillance cameras, only keeping a tracking collar around her neck as a vow. He drops to one knee, begging for the right to keep her by his side for a lifetime."