A study in murder

The year is 1917 and Major John Watson is held in a notorious prisoner of war camp deep in Germany, there as Medical Officer for the British prisoners. With the Allied blockade of Germany, food is perilously short in the camp and when a new prisoner is murdered all assume the poor chap was killed for his Red Cross parcel. Watson, though, isn't so sure. Something isn't quite what it seems and a creeping feeling of unease tells Watson there is more to this than meets the eye. And when an escape plot is apparently uncovered in his hut and he is sent to solitary confinement, he knows he has touched a nerve. If Watson is to reveal the heinous crimes that have occurred at the camp, he must escape before he is silenced for good. All he needs is some long-distance help from Sherlock Holmes...