Mitamura visits an art collector and finds that he is dying. Dalem, a shady art dealer prepares to privately auction the Vermeer painting "The Concert" for his boss Leone. It was stolen 15 years ago, from the Isabella Stewart Gardner Museum and Scotland Yard's Inspector Roger Warner disguises himself as the art collector Mr Peters to trap Dalem. Meanwhile, Fujita, with Mitamura disguised as his secretary, meet in London to retrieve the painting on behalf of the museum...