Agatha Raisin can think of nothing duller than a lecture on birdwatching - but events take a thrilling turn when an angry interloper storms the stage at the Carsely Ladies' Society and threatens the three bird fanatics. When Agatha walks in on the trio of women in the middle of a blazing row, her detective instincts start 'twitching'. And when one of the birdwatchers is found dead, she can't resist investigating. Her first lead comes from the victim's brother, who believes his sister was murdered by her fellow twitchers. Further digging reveals the disturbing nature of the women's friendship - and a bewilderingly long list of suspects.