Riccardo Freda's Tragic Ceremony (1972) stars I Spit on Your Grave (1978) fave Camille Keaton as Jane, a hippie babe out for a weekend of hippiefied cavorting with three hippie cohorts. One of the lucky fellas, Máximo Valverde, gives her a lovely pearl necklace (not that kind) that just happens to have belonged to a lady rumored to be demon-possessed. Then a storm whips up and the foursome flees to the nearest shelter, which, wouldn't you know it, is a mansion presently occupied by a bunch of Satanists getting prepped for a big sacrifice. The Satanists want Cam . . . and who wouldn't after seeing her soaking-wet mams?