Markus goes home to his teenage daughter, Mathilde, when his wife dies in a train crash. All appears to be a tragic accident until a mathematics geek, who was also a fellow passenger on the train, and his two colleagues show up.

In Roman-ruled Britain, a young Roman soldier endeavors to honor his father’s memory by finding his lost legion’s golden emblem.

Four young men who belong to a New England supernatural legacy are forced to battle a fifth power long thought to have died out. Meanwhile, jealousy and suspicion threaten to tear them apart.