Marc has been accepted as a ghardian, one of the elite soldiers who protect the timelines of the future. He's eager to prove himself and experience combat on his first training op to Ancient joining the conflict and fighting alongside the Gauls against the Roman invaders. A true ghardian puts his emotions aside, and functions purely on logic, but that lesson is easy to forget in the heat of battle, especially when Marc's closest friend is in danger.

When Lila Cammell is abandoned by her time-jumping partner, leaving her alone in Britain in the Dark Ages, revenge is the only thing on her mind. She’d trusted Jared Grohl with her life and her heart, and bringing him to justice will be sweet. Finding him captured and enslaved by the Saxons changes all her assumptions. Now it's a fight for survival, but the only way to save him, might be to leave him behind.

Time travel student Isabella Gillman is about to embark on her most challenging assignment—leaping back to 1941 to observe World War II. The rules are simple: don’t get emotionally involved, and don’t interfere. She breaks the first rule when she falls in love with rear-gunner Davy Porteous. The second is on its way out as well when she realizes history says he won’t survive the war. Torn between the fundamental laws of her society and the man she loves, Isabella faces a harsh reality: does she risk both their lives for a future that may not happen? She can’t predict the results if she corrupts the timelines, but without her actions, Davy is out of time.

How far would YOU go, to save the man you love? The primary rules of time travel are 1. Never interfere, and 2. History is set in stone. Juliet broke the first without meaning to. Now, to save the man she loves and undo her mistake, she'll have to risk her entire future by breaking the second. Juliet's father wants her to marry for prestige, but she's less-than-pleased with the partnership he's arranged for her. To keep her freedom, she convinces Marc to ask for her hand instead. He insists the union is only temporary, but she's got two weeks of travel with him to the 1990's to convince him their relationship is more. Then she makes a mistake that not only threatens the timelines of the past, but puts the future at risk too. Breaking the rules has never been more dangerous.