Bernard Ollivier will have walked, the retirement come, from one end of Asia to the other, from Istanbul to Xi'an, along the old Silk Road. Four years spent with shoes on, mainly in the summer, in order to be able to cross the high passes of Anatolia and Le Partir, which are impractical in winter. Four years told over the days in a story that is in no way the evocation of an exploit but the sharing of a rare human adventure, by a marveled traveler going from meeting to meeting and who notes that his project is is as mysterious as the world.