The I Know What You Did Last Summer film franchise (1997–2025) follows groups of teenagers who cover up a fatal hit-and-run accident, only to be stalked and murdered by a hook-wielding killer ("The Fisherman") one year later as punishment for their secret. The series centers on themes of guilt, revenge, and the consequences of keeping deadly secrets. 

I Know What You Did Last Summer (1997)

I Still Know What You Did Last Summer (1998)

I"ll Always Know What You Did Last Summer (2006)