“Last Summer” deals with the demise of a star high-school student. Her spirit haunts friends and family members who are guilty in their own ways for the girl’s death. A group of youngsters are cutting loose for a weekend of partying. One kid, Singha, steals his dad’s car and the keys to the family’s beach house, and brings along his classmates, including his buddy Garn, budding actress and popular girl Joy and Joy’s gal pal Meen. Beach frolicking and boozing at the house follow, but then Joy becomes drowsy and she’s never the same again.