Chastening at Somnum -- or the Hypnotic Adventures of some Roman Legionnaires

Darius, an enlistee in Legio V Alaudae, is deployed to the mysterious Isle of the Somnum Priests. He sneaks away from the Roman camp one night for some much-needed release. But, as he, and eventually his mates, discover, the Priests have a Law that even a Legionnaire ignores at his peril.