There are patrols out on the streets of Rome searching for Lucius, Quin and Isi, but they have bigger problems to deal with. The body of a man is found washed up on the banks of Tiber, it is revealed to be Apollinaris, a former physician to the deceased emperor Titus. Certain that the physician would not have taken his own life, the three set out to find Apollinaris's murderer. This leads them on a dark journey to Britannia filled with bloody battles and tales of mystery and deceit. But will the trio find out who the murderer is before it's too late?