It was supposed to be a routine hunt—just another vampire nest, another small-town case, another night of saving lives. But when their younger sister insists on proving she’s ready to stand beside them, one wrong move turns the hunt into every Winchester’s worst nightmare. Trapped beneath a collapsing building and bleeding out while monsters close in, she forces Sam and Dean to confront the one thing they’ve spent years trying to outrun: the possibility of losing family again. As old guilt resurfaces and impossible choices have to be made, the brothers discover that saving strangers has always been easier than saving the person they love most.