Set in London in 1907, A Gentlemans Guide to Love and Murder centers on Monty Navarro, a penniless clerk who is informed after the death of his mother that he is ninth in line to inherit the earldom of Highhurst, controlled by the wealthy DYsquith banking family. After the imperious ruling Lord dismisses Montys claim of being a relative, the eight DYsquiths ahead of young Mr. Navarro begin dying in natural and unnatural ways. (A single actor plays all the not-so-nice D'Ysquiths, adding to the merriment.) Meanwhile, Monty is trying to woo money-minded Sibella Hallward until he finds himself drawn to young Phoebe DYsquith. How will all these convoluted storylines come together?