As war consumes the nations of our world in the year 2021, Navy SEAL Jacob Hunter is sent on a mission to Syria to apprehend a crazed terrorist leader armed with dangerous biological weapons. It's a routine mission for a man who has spent the entirety of his military career fighting in what many have dubbed World War III, but his life is about to become everything but predictable. As their mission unravels around them, Hunter discovers a curious trinket that belies all rationality and our understanding of the universe, but he is drawn to it nonetheless, bewildered by its uniqueness. Unable to control his urges, Hunter touches it, and in a flash of brilliant light and intense pain, the team is no longer in contemporary Syria - but in Ancient Rome during the reign of the emperor Caligula. They stand dumbfounded, unable to comprehend the paradox they've created, but the bleak truth of reality soon overtakes their disbelief. The fact that they should not be there becomes obvious almost immediately, as does the thought that with every breath they take, everything history has worked so hard to achieve is at risk of unraveling. Staying alive suddenly becomes a secondary objective, superseded by the theory that their mere presence in Ancient Rome has caused irreparable damage to the timeline. This won't be an easy task for Hunter and his friends as they will quickly encounter numerous Roman figures straight from his old history books, each with their own agendas, schemes and machinations, including the Caesar himself, who history remembers as little more than an insane tyrant who once tried to appoint his horse as the head of state...