A theater troupe's young, energetic leader has secured an old theater in which to produce his new production. The theater's elderly caretaker urges the group to leave at once. A vampire is awakened and discovers that one of the troupe is the reincarnation of the woman who he once loved.

The story of Dulcinea, the love of Don Quixote, who was only a normal girl named Aldonza that is suddenly involved by the legend of the brave and ingenous gentleman.

Olivier, a handsome but callow and moody young student, picks up an enthusiastic actress during a theatre rehearsal, and is introduced to her acquaintances -- a group of jaded rich kids who spend their time storming around the Riviera harassing passersby, throwing wild parties and following all the latest trends. When sexy Elke gives him the eye, he leaves the actress in the lurch and joins the gang for a decadent party aboard a yacht. However, Elke's wanton ways and Olivier's inexperience do not mesh, and in a snit, he accidentally sets the yacht afire. The gang wreaks its vengeance by luring him into a dangerous contest of bravura on a construction site.

It is fruit-picking season in the plain and pickers come from all over and live in a camp for several weeks. Among the many pretty girls are Kissa, a natural vamp who delights in exciting men; Margo who is hard and tough, and Josine who is tender and romantic. They work in a feverish atmosphere and inflamed by the summer heat, youthful passions run riot, and the girls' sensual behavior cause rivalry among the men. Lorry driver Armand applies the same degree of ardor to his love-making as to his work, and his biggest rival is the boss' son, Berto, a strutting rooster who is very proud of his American car. After work each day, Kissa queens it in the cabaret on shore, and derives great pleasure in arousing jealousy between the men.

A group of friends decide to spend a weekend in a castle belonging to Riccardo, a moody and hyper-sensitive young artist. The only other inhabitants of the castle are a mysterious housekeeper, Caterina, and the demented Aldo. The group are joined by two friends: Serena and a young American medium, Anthony. During a seance Anthony predicts a tragedy, then leaves the castle, shocked by his own visions. An hour later, Serena is found strangled to death in bed. The others become gradually more and more diffident and suspicious, especially when another girl is murdered...