I Know What You Did Last Summer(1997)
Videos: Trailers, Teasers, Featurettes
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".
I Know What You Did Last Summer - watch online: streaming, buy or rent
You can buy "I Know What You Did Last Summer" on Apple iTunes as download or rent it on Apple iTunes online.