A dense yellow miasma swirls in the streets of London as Sherlock Holmes and Dr Watson accompany a young woman to a sinister assignation. For Mary Marston has received several large pearls - one a year for the last six years - and now a mystery letter telling her she is a wronged woman.
If she wishes to seek justice, she must meet her unknown benefactor, and she begs the great detective and his friend to accompany her on her mission.
Sherlock agrees, and Watson is only too keen to comply with her request, having fallen in love with the beautiful Mary. But unknown to the three companions, others stalk London's fog-enshrouded streets: a one-legged ruffian with revenge on his mind - and his companion, who places no value on human life... 4 CDs. 4 hrs 30 mins.