A baffling murder and a missing detective.

When a young woman is murdered on Tower Bridge, former spy Augusta Peel expects Scotland Yard to call on her for help.

But no call comes.

Meanwhile, Augusta is preoccupied with the success of her Bloomsbury bookshop. It's doing so well that a rival establishment is losing customers. When the rival shop seeks revenge, Augusta must fight to protect her livelihood.

But as the Tower Bridge murder case stalls, Augusta feels sure her sleuthing skills can help. The trouble is, no one's seen her friend Detective Inspector Fisher for some time. And it's not long before Augusta discovers he's completely disappeared...