[2] Unlike many of Heyer's historical novels which concentrate on a plucky heroine, this one follows the adventures of a male main character, an ex-captain in the British Army who has returned from the Peninsular War and finds life as a civilian rather dull.

The setting for this detective/romance story is in and around a Toll-Gate in the Peak District, vastly different from the elegant backgrounds of London, Bath, Brighton, or some stately home, which characterize most of Heyer's Regency novels.

A combination of curiosity, compassion, tiredness, and dampness lead him to stay at the toll house overnight with a view to sorting out the situation in the morning.

Over the next few days Jack's circle of acquaintances rapidly expands to include a highwayman, a Bow Street runner, and the local gentry plus their devoted retainers.

In the process of preventing a scandal, Jack also manages to identify the murderer, deal with the villains, retrieve the treasure, satisfy the law, provide for his friends, and resolve his own romance.