As a fully-fledged agent of the Federal Bureau of Temporal Investigation, seventeen-year-old Lieutenant Nonie Thorburn's job is to keep the timeline intact. While that sounds like a noble cause, it is incredibly difficult to pull off while stranded in the past without any means to track down the madman out to kill one of the most important historical figures of the last century, Captain Kieran Wildason-who also happens to be the man Nonie is in love with.
Chasing the assassin through decades long gone, Nonie must keep Kieran alive and the timeline from changing, or else the consequences will be dire. But the more she learns about the past and Kieran, the more she realizes something doesn't add up. Somebody is meddling with the timeline, somebody from far up the time stream, in the distant future.
Caught in the middle of a temporal war, Nonie must do what fate has set in motion if she wants to save the world as she knows it, even if it means sacrificing the man she loves.