In Regency London, Jolyon Everett is determined to dissuade his irascible friend, Captain Ben Harding, from fighting a duel. However, before commencing on the pressing business of defusing Ben's misplaced anger, Jo writes two notes -- one to Percy Havilland, his very demanding paramour, and the other to his tailor, Daniel Walters. With those trifles out of the way, he can concentrate on persuading Ben to reprieve young Edward Stephens, a newly qualified doctor, who Jo suspects has a serious crush on Ben.
But the best-laid plans can go awry, as do the letters. As well as a furious Ben, Jo finds himself at the mercy of an outraged Percy and an amorous tailor. Can he convince Ben not to shoot Edward after all? Will he soothe Percy's ruffled feathers? And might Jo realise true love can be found under the most unexpected conditions?