▁adaptation ▁lo os ely ▁based ▁on ▁the ▁novel ▁was ▁released ▁in ▁ 1 9 9 7 . ▁ ▁Plot ▁ ▁High ▁school ▁senior ▁Jul ie ▁James ▁receives ▁a ▁note ▁from ▁the ▁mail ▁that ▁reads ▁" I ▁know ▁what ▁you ▁did ▁last ▁summer ." ▁The ▁previous ▁summer , ▁Jul ie , ▁her ▁then - boy friend ▁Ray ▁Br ons on , ▁Ray ' s ▁best ▁friend ▁Barry ▁C ox , ▁and ▁Barry ' s ▁girl friend ▁Helen ▁R ivers ▁were ▁driving ▁home ▁after ▁part ying ▁in ▁the ▁mountains . ▁They ▁accident ally ▁run ▁over ▁and ▁kill ▁a ▁young ▁b icy cling ▁boy ▁named ▁David ▁Gre gg . ▁After ▁Ray ▁an onym ously ▁calls ▁an ▁amb ul ance ▁for ▁David , ▁the ▁four ▁make ▁a ▁p act ▁never ▁to ▁tell ▁anyone ▁about ▁their ▁invol vement ▁in ▁the ▁incident . ▁Jul ie ▁and ▁Ray ▁subsequently ▁dr ift ▁apart ▁from ▁one ▁another , ▁and ▁Ray ▁moves ▁to ▁California ▁for ▁work . ▁Out ▁of ▁gu ilt , ▁Jul ie ▁an onym ously ▁sends ▁yellow ▁ros es ▁to ▁David ' s ▁fun eral . ▁ ▁After ▁receiving ▁the ▁note , ▁Jul ie ▁vis its ▁Helen ▁at ▁her ▁a partment . ▁Barry ▁is ▁invited ▁over , ▁and ▁he ▁re ass ures ▁the ▁girls ▁that ▁it ▁is ▁just ▁a ▁pr ank ▁and ▁that ▁anyone ▁who ▁knew ▁about ▁their ▁invol vement ▁would ▁go ▁to ▁the ▁police ▁instead ▁of ▁leaving ▁notes . ▁Ray ▁returns ▁home ▁after ▁a ▁year ▁away ▁in ▁California ▁and ▁tries ▁to ▁get ▁back ▁together ▁with ▁Jul ie . ▁However ,