'What is your profession, Mr Holmes?' When Nell Villiers' policeman husband vanishes on a routine case, her life is wrecked. Placed under protection by Inspector Lestrade, Nell is ripped from her old life and her own secret police work. Instead she must live as a widow, Mrs Hudson, in a safe house: 221B Baker Street. Two years on, with the case still unsolved, Nell vows to defy Lestrade and use her skills to discover the truth. She takes a lodger to cover her tracks; a young man called Sherlock Holmes. How could she know what would happen? 'It's always been fun before - but now the police are the enemy...'