Psychology student Olivia Eriksen's family is notorious among true-crime buffs. Faced with a legacy of psychopathy that spans generations, Olivia has spent much of her academic life trying to answer one chilling question: Nature or nurture? Although she's kept a safe distance from her blood relatives for years, Olivia agrees to attend a weekend reunion. After all, her fian?c is eager to meet his future in-laws, and the gathering may give her a chance...