8MM 2 (2005)

David Huxley, low-born self-made legal counsel at the US embassy in Budapest, may expect his career to be boosted by his impending marriage to Tish, daughter of old money tycoon and ambassador to Hungary Harrington. But when the happy couple spends a night of hot sex at a spa, including a threesome with an exhibitionist model, they are secretly filmed, and the suspect is found murdered in their hotel. To handle the blackmail, they venture into a sex club where porno movies are made. Tish volunteers to 'act' so David can snoop around, but that only gets them into even greater danger, which ultimately proves most deceptive.