Bobby Singer is gone. In the wreckage of their surrogate father's life, Sam and Dean Winchester discover a surprise they weren't expecting - a teenage girl named Eden, mute and shrouded in mystery. Bobby took care of her but kept her and her origins a hard secret. Now, haunted by his silence and Eden's haunting quietude, the brothers must unravel the truth. Eden's past is a tightly shut book. Why won't she speak? What darkness did Bobby shield her from, a darkness that could have followed him even in death? As they hunt in the world of the Supernatural, which seems like it's constantly expanding, the Winchesters grapple with a horrifying question: is Eden a victim, or is the silence a terrifying weapon? With whispers of a forgotten lore and shadows clinging to Eden's every move, the Winchesters must confront a chilling truth - sometimes, the most dangerous secrets lie not in what's said, but in what's left unspoken. Can they break Eden's silence before it's too late, or will her past consume them all?