On a supposedly relaxing forest planet, the Doctor, Amy Pond and Rory Williams find themselves surrounded by the Propheetis, a war-hungry and ruthless species believed destroyed in the battle of the Cran Movement. These remaining Propheetis are welcoming and take them to the castle as guests. The Doctor and his friends are shown the laboratories. With their new sense of peace, the Propheetis, have been using the latest technology to rebuild themselves. So far the technology is unreliable and doesn't always do as it’s told.