Fifteen-year-old Polly Kimball sets fire to the family farm, killing her abusive father. She and her young brother find shelter in a Massachusetts Shaker community called The City of Hope. As she struggles to keep her dark secrets concealed in the face of increasing scrutiny, Polly finds herself in a life-changing friendship with a young Shaker sister named Charity, a girl who will stake everything --- including her faith --- on Polly's honesty and purity.