London, 1670. The completion of his new project could not run more smoothly for Christopher Redmayne. Commissioned to design a new house for the merchant Francis Polegate, Redmayne is pleased that everything has gone without a hitch. To celebrate the success of the venture, Polegate throws a party and invites him as an honored guest. Also invited are Susan Cheever, Redmane's sweetheart, her father, Sir Julius Cheever MP, and Bernard Everett, Polegate s brother-in-law. But the party comes to an abrupt end when one of the guests is murdered upon leaving the house . . .