When a rare and endangered species of snow leopard is reported to have killed a number of large animals in the forests of Tibet, a four-man TV wildlife documentary crew, armed with the latest night-time filming technology, fly out to capture it in action. Setting up camp in a remote forest, miles from civilisation, the team quickly discover that all is not what it seems. Strange sounds are emanating from the woods, mysterious images are found hidden in footage, and when the camp suffers from savage attacks, it quickly becomes apparent something hostile is stalking them. But which species is really under threat... animal or human?