Andrzej Zulawski teams for the fourth time with his life-partner, Sophie Marceau, on Fidelity, a reckless updating of Madame de la Fayette's novel, La Princesse de Clves, writes David Parkinson.

What starts promisingly as a scathing dissection of modern cultural vacuity soon takes a turn for the worse as Marceau's Canadian photographer tumbles into bed with children's book editor Pascal Greggory and thus forges an unbreakable bond that compels her to withstand the passionate advances of sexy shutterbug, Guillaume Canet.

Dissing the gutter press and deflating academic pomposity are worthwhile intentions. But it's hard to make a convincing case when the melodrama is this pretentious.