Secretary framed by her own advance double
Dany Longo, a myopic Paris secretary, is asked by her employer Michel Caravaille to drive his family to the airport and return his white Thunderbird, but on impulse she drives it south toward the Mediterranean. Along the road she is attacked and her hand is injured, and gas-station attendants and café owners insist she passed through the day before, until she finds a corpse and a rifle in the trunk. The resolution shows that someone wearing her look had driven the route a day earlier to lay a witness trail, setting Dany up to be found dead as an apparent murderer and suicide.
