For the freedman Quintus Licinius Cato, who received Roman citizenship from the hands of Emperor Claudius himself, military service is a chance to take a worthy place in life. However, for his colleagues, the recruit is a “black sheep”, and an upstart from the capital is hardly worthy to serve under the Silver Eagle of the famous Second Legion. In bloody skirmishes with the Germanic tribes, Cato wins the respect of his comrades. But the ordeal is just beginning. The Legion will have an expedition to the mysterious, fog-shrouded, enigmatic and gloomy island of Britain, whose barbarian tribes even Julius Caesar was unable to conquer.