It is the 1860s; Japan is closed to foreigners and this has to be a clandestine operation. During his undercover negotiations with the local baron, Joncour's attention is arrested by the man's concubine, a girl who does not have Oriental eyes. Although the young Frenchman and the girl are unable to exchange so much as a word, love blossoms between them, conveyed by a number of recondite messages in the course of four visits the Frenchman pays to Japan. How their secret affair develops and how it unfolds is told in a narration as beautiful, smooth and seamless as a piece of the finest silk.