As they celebrate their high school graduation, four friends are involved in a hit-and-run accident when their car hits and apparently kills a pedestrian on an isolated roadway. They dispose of the body and vow to keep the incident a secret, a year later somebody starts sending them letters bearing the warning "I Know What You Did Last Summer".
Plot Keywords: secret, blackmail, fisherman, police, high school, cover-up, friends, revenge, murder, pageant, slasher, teenager, killer
|Writers||Lois Duncan, Kevin Williamson|
|Production Companies||Summer Knowledge LLC, Mandalay Entertainment, Columbia Pictures|
|Production Country||United States of America|