The year is 1917 and Doctor John Watson is prisoner in a notorious POW camp. With the Allied blockade of Germany, food is perilously short, and when a new prisoner is murdered, all assume he was killed for his Red Cross parcel. But Watson isn't so sure. 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, he knows he has touched a nerve and he must escape before he is silenced for good. All he needs is some long-distance help from his old friend Sherlock Holmes ...