1971 proves an explosive year at Castle Gate as CID investigates a bomb at an Oxford college and a death threat to Oxford Wanderers star striker. The death of a local taxi driver leads to a conspiracy at the heart of London's Soho, and when winter brings with it an almighty snowstorm, Endeavour finds himself stranded at an abandoned hotel, caught in a game of gruesome revenge, while Thursday races to find him before it's too late.