Sci-fi comedy set in 2151 that follows spaceship HMS Camden Lock as it goes about protecting British interests in a changing galaxy. When presented with a mysterious object Henderson can't help but try to return it to its rightful owners despite York's warnings that it's a classic hero trap. The three senior officers find themselves on a forest moon suddenly surrounded by aliens ready for revenge. After narrowly being avoiding destruction last year they have acquired new technology and are ready to strike back by putting Henderson, York and Teal into a reality TV gladiatorial contest.