The Mystery of Sgt Adela White is a short story whose protagonist, inspector Franco Fog, known from The Vengeance of Women and Hot Dagger of the Spanish Temptress, faces the challenge of solving the riddle of a theft of a priceless diamond ring – the main prize in the Miss Police Contest. However, when the problem finally seems to be solved, some new trials and tribulations occur. Let's see how the meeting with a desperate female sergeant will end for Franco Fog.