In peace or war, the starship USS Skipjack is the pride of the Federation, its brave crew trained and ready to explore the farthest reaches of the galaxy..or travel through time itself. In search of rare historical data, the Skipjack embarks on an unprecedented and hazardous voyage into the past. The mission: to observe Earth during World War II..and the planet Eisernon on the eve of its devastating One-Day War. But with the future of two worlds at stake, can Captain Riker and his crew resist the temptation to tamper with the couse of history?