The traditional Appleby Horse Fair hosts the largest gathering of Gypsies and Travellers in Europe. The sudden influx of more than 40,000 visitors into the small Lakeland town has always caused its share of problems. But it's also known as a good time to settle old scores. This year, the Fair brings with it with the discovery of two bodies near the River Eden - one very recent and another a long-time buried. As CSI Grace McColl and Detective Nick Weston search for answers, old secrets are revealed, old wounds are reopened, and tensions threaten to erupt into violence.