1917: Doctor John Watson is a prisoner in a notorious POW camp deep in enemy Germany. With the Allied blockade in force, food is perilously short; and when a new prisoner is murdered, all assume the poor chap was killed for his Red Cross parcel. But Watson isn't so sure. Something isn't quite what it seems, and a creeping feeling of unease tells him 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 his old friend, Sherlock Holmes ...