After the sudden death of her popular, athletic older sister, 16-year-old Jo fears her shattered family may never recover from the loss. But then Jo stumbles on the impossible: Audrey, standing barefoot in the backyard, real and solid. Except... Audrey isn't breathing, she's still marred with the evidence of an autopsy, and rapidly decaying. Worst of all, Audrey is hungry, and only human blood, willingly given, can curb her relentless appetite. Jo hides Audrey in the garden shed and sustains her with her own blood. When her search takes her to her sister's grieving inner circle of friends, Jo finds herself drawn into their fold. Struggling to meet her sister's increasing demands, protect her parents, navigate her fracturing friendship, and indulge her growing infatuation with Sam, Jo will be forced to decide which of her loved ones she needs the most—and which she's willing to sacrifice to save them.