Eli Sands's time-traveling talent has led him to his missing mother's location: San Francisco, 1941. But the U.S. has just entered World War II, and Margarite Sands won't return home until she's sure the secret of time travel is safe from the Nazis. Once again on the front line of danger, Eli and his companions, Clyne and Thea, pursue an enemy agent back through time. With the help of new allies, King Arthur and Merlin, they must do whatever it takes to keep the legendary sword Excalibur from falling into hands intent on one purpose— world domination.