Sudden Impact is Eastwood's fourth Dirty Harry film. Released in 1983, follows Inspector Callahan (Eastwood) as he's shipped to San Paulo, a small town down the coast to investigate a murder. The killer is Jennifer Spencer (Sondra Locke) who out for revenge is murdering all the rapists that gang-raped her and her little sister 10 years ago. During his investigations, Callahan becomes entangled in Jennifer's own troubles - all the while never suspecting that she's the killer.