S-Squad are relieved to be home, and even an order to investigate animal mutilations at a local wildlife park does not seem like an onerous detail. But things take a turn to the twilight zone all too quickly around the S-Squad, and even their homeland is not immune. Something is feeding, ravenously, on animals, wildlife, and now people in the Scottish Highlands, and the trail leads to only one place, a place of legends, and the dark waters of Loch Ness.