Dr. Eve Tsui has built her life around control—filtering the overwhelming sensory world through her hyperosmia, the rare condition that lets her detect molecular traces others can't imagine. But when she catches the impossible scent of her sister Joy, who died mysteriously fifteen years ago, that careful control shatters.

The trail leads to a killer who doesn't just murder his victims—he erases them completely, stealing and preserving human consciousness itself like trophies in a twisted gallery. As bodies pile up in mathematically precise arrangements and her business partner Mira falls into his hands, Eve realizes she's not hunting a serial killer—she's facing something that challenges the very nature of what makes us human.