Constance Grail, a common viscount's daughter known for her sincerity, faces a bleak situation after her fiance is snatched away and she is wrongly accused of theft. As she awaits punishment, a ghostly figure materializes offering a pact. This spectral being is Scarlett Castiel, a once esteemed noblewoman renowned for her beauty and lineage, executed a decade prior for her misdeeds. Upon accepting the ghostly bargain, Connie finds herself possessed by Scarlett's vengeful spirit, swiftly turning the tables on her accuser and averting her grim destiny. But delving into agreements blindly may tether one to a spirit seeking retribution against its own adversaries!