Young Ones Are Even Cold in the Summer (1978)

A girl returns from a trip out of the country and is given a strip-search for drugs when she re-enters Switzerland. Lacking a place to stay, she looks up an old friend of hers and stays with him, working to pay for food for both of them. In the casual manner of such arrangements, several more people enter the scene to stay: a rich kid who has been disinherited and a girl who is an escaped convict. The working girl has been hiding some of her wages in her clothes, and the two young men steal the money, buy a car, and hare off looking for excitement.