Returningtoherhometown,EdenRock,andoverwhelmedbythebirthofherfirstborn,ChloevanHeerden(19)triestocometotermswithmotherhood.Despitethesupportfromherlovingmother,Ruby(35),Chloestruggleswiththedemandofbeinganewmom.Theincessantcryingofherbaby,thegrowingsenseofguiltandparanoiasendsChloeintoadarkdepression.Withaheightenedurgetoprotectherson,Chloeseesdangerineverysituation.DistraughtshepaysavisittofamilypsychologistDr.TimothyReed(40s)whodiagnosesherintrusivethoughtsandfeelingsofanxiousnesstoamildcaseofbabyblues.Yetthethoughtsgrowworseandmoreviolent.Chloestartstohearvoicesandhummingofachildhoodlullabyandseesflashesofastrangeentityaroundherchild.Convincedthattheentityisreal,Chloedoeseverythinginherpowertoprotectherson.Herdeclinereachesfeverpitch,andeverybodyseemstobemovingagainsther.Desperate,Chloefindssolaceinthearmsofher