▁her , ▁but ▁a ▁minor ▁argument ▁ens ues ▁between ▁the ▁two ▁sister s ▁after ▁she ▁does ▁so , ▁though ▁Carol ▁quickly ▁def uses ▁it . ▁ ▁Later ▁that ▁day , ▁Carol ▁must ▁cover ▁for ▁a ▁co - member ▁of ▁her ▁women ' s ▁club ▁and ▁host ▁a ▁club ▁lun che on ; ▁however , ▁the ▁lun che on ▁runs ▁late , ▁leaving ▁her ▁unable ▁to ▁pick ▁up ▁Wend y ▁( who ' s ▁stay ing ▁after ▁school ▁to ▁work ▁on ▁a ▁science ▁project ). ▁Since ▁Bill ▁is ▁in ▁Los ▁Angeles ▁for ▁a ▁meeting ▁concerning ▁his ▁a for ement ioned ▁business ▁deal , ▁Carol ▁calls ▁J ill ▁at ▁the ▁record ▁store ▁where ▁she ▁works ▁and ▁asks ▁her ▁to ▁pick ▁Wend y ▁up , ▁but ▁J ill ▁in ad vert ently ▁forget s ▁about ▁it ▁until ▁ 1 0 ▁minutes ▁after ▁she ▁was ▁supposed ▁to ▁be ▁at ▁Wend y ' s ▁school . ▁ ▁However , ▁once ▁on ▁the ▁road , ▁J ill ▁runs ▁into ▁a ▁traffic ▁jam ▁and ▁doesn ' t ▁get ▁there ▁until ▁much ▁later . ▁Not ▁finding ▁Wend y ▁anywhere ▁on ▁the ▁school ▁grounds , ▁she ▁hur ries ▁home ▁and ▁tells ▁her ▁parents ▁the ▁news ; ▁Bill ▁returns ▁to ▁the ▁school ▁with ▁her , ▁but ▁they ▁are ▁still ▁unable ▁to ▁find ▁Wend y , ▁and ▁the ▁police ▁are ▁called , ▁who ▁soon ▁discover ▁the ▁presence ▁of ▁blood ▁and ▁suspect ▁it ▁might ▁be ▁hers . ▁ ▁Unable ▁to ▁sleep ▁that ▁night , ▁Bill ▁and ▁Carol ▁receive ▁a ▁visit ▁from ▁one ▁of ▁the ▁detect