Dead Babies (2000)

Instead of having a good time at a secluded palatial estate somewhere in the British countryside, Quentin and his hedonistic group of friends and pleasure-seekers, unbeknownst to them, will soon find themselves targeted. A violent underground terrorist organisation known only as the "Conceptualists" roams the region, thirsty for blood and murder--and as the blissful party-goers don't realise the imminent danger--the killings begin. Is there a wolf in sheep's clothing among them?