When the Swiss art dealer Yves Bouvier meets the Russian oligarch Dmitry Rybolovlev, he quickly rises through the ranks. From a role as a discreet adviser, he becomes a global power broker and manager of Rybolovlev’s investments in one of the world’s most closed and enigmatic markets: the part of the art world where the sums are staggering and the value of artworks is something agreed upon by a narrow elite of connoisseurs and ultrarich tycoons.