Eerie things happen on board the "Conqueror" spaceship, which will fly to distant solar systems in 2092. The biologist Anna Saltini is suddenly untraceable. Even the flight coordinating computer, a masterpiece of human ingenuity, cannot provide any information. And other participants in the expedition are killed in an enigmatic way. Accident or murder? Has the computer been tampered with? Who's the culprit? In the end there is a surprising solution to the case.