Flavia de Luce is a precocious 11-year-old English girl with two annoying older sisters and a passion for chemistry. After hearing her father arguing with a stranger in the night, she finds a dead body in the garden the next morning. Flavia decides to use her deductive reasoning to solve the crime, which involves a rare Penny Black postage stamp. Reminiscent of the classic British mystery with a unique and appealing narrator.