Innocent Lies

Innocent Lies is a 1995 British-French thriller film directed by Patrick Dewolf and starring Stephen Dorff, Gabrielle Anwar, Adrian Dunbar and Joanna Lumley. It is a loose adaptation of the 1944 Agatha Christie novel "Towards Zero". Keira Knightley, appearing in her film debut, had an early role playing the younger version of Celia Graves, the character portrayed by Anwar. Its French title was Les Pêchés mortels.
Synopsis.
A British policeman travels to France in 1938, to investigate the death of one of his colleagues. He becomes interested by a family of wealthy Britons who live in luxury in a French coastal resort, and who were heavily involved with the dead man. He soon uncovers a number of dark secrets which the family has tried to conceal.