The narrator's old friend, Thierry, decides to start his own company, carrying people to England from their home town in northern France, as a chauffeur, guide and interpreter. He is very happy for those welcome pretexts to explore all sorts of parts of southern England and share and exchange with his SC3 friends. Unfortunately, his success makes some people envious, and unbeknownst to him he makes enemies for himself. Enemies who will not hesitate to attack his company by all kinds of means, including murder. Will the friends manage to help the police solve that mystery?