Perdido por Cem (1973)

Artur, in Lisbon for his holidays, wanders aimlessly, and is picked-up by Rui, a young man who is into marketing and advertising. Joana is in Lisbon for holidays, but also trying to escape from a mysterious, dark passion. Artur and Joana come together, find common roots in their rural background, but their union comes to an end, as someone from Joana's past interferes.