Work. Rest. Repeat.

It is sixty years since The Great Disaster. Only three cities remain. In them the few thousand workers, the last remnant of humanity, strive night and day to complete the colony ships that will enable them to leave the Earth. If humanity is to survive, nothing can interfere with this last great effort. When two bodies are found, there is no doubt that it is murder. The only motive can be sabotage. It is down to Constable Ely to solve this crime. The ships must launch. The killer must be caught. Above all, production must come first.