The Plastic Conjunction was a collection of seventeen protein planets which farmed smoke and oil for the Nestene Consciousness.
During the Last Great Time War, the food planets were destroyed (TV: Rose) along with the Nestene's Crownworld of Nestenia and their homeworld of Polymos. After the war the Nestene ended up on dying Nestenia and swore revenge on the Time War. (PROSE: Revenge of the Nestene)