Wolfe’s cook has come down with the flu. Wolfe has switched to a diet of canned foods. Opening a jar of pâté, he discovers it is heavily seasoned with quinine. Outraged to the depths of his soul, Wolfe begins an investigation. In the course of the case, the body of the pâté factory’s owner is found, whose adopted son in fact turns out to be his own brother. Everyone is suspected of the murder, from the niece and brother to the brother of the mother of the brother. And then there is that quinine in the pâté…