Novelist Alexander Trocchi's uneasy blend of Beat existentialism and pseudo porn continue to gnaw in this stylish adaptation of his 1954 whodunnit. Ewan McGregor is suitably dour as the sinister drifter while director David Mackenzie proves himself a master of sustained gloom. But it's the sex scenes, progressing from erotic to self-conscious to simply absurd, that continually corrode.