Four friends are celebrating their high school graduation when their automobile hits and kills a pedestrian on an isolated route in a hit-and-run tragedy. One year after disposing of the body and swearing to keep the incident a secret, they begin receiving letters with the warning "I Know What You Did Last Summer" in them.
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Four friends are celebrating their high school graduation when their automobile hits and kills a pedestrian on an isolated route in a hit-and-run tragedy. One year after disposing of the body and swearing to keep the incident a secret, they begin receiving letters with the warning "I Know What You Did Last Summer" in them.
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