“No, sir, I really saw this carriage and it was shining. Four horses rushed past and not a single bridle clinked, not a single hoof hit” - this is how Plunkett describes the meeting with the mysterious carriage to Lord Peter Wimsey. But when Lord Peter himself meets this carriage in the dead of night on a country road and, without catching up with it, understands that Plunkett was right, he decides to solve the mystery of the luminous carriage and at the same time unravels the tangle associated with the death of Bradock.