The Great Sontaran War has raged across the cosmos for millennia and finally it is coming to the Earth.

Major Kreg has been dispatched to carry out a strategic assessment of the planet. He will learn about the dominant life form, decide what the world has to offer, and discover the ultimate value of the human race.

For Torchwood, there is only one place to put him. Welcome to the Mumbles Bay Caravan Park.