Yves Bouvier, a Geneva-based art dealer, is at war with Dmitry Rybolovlev, a Russian oligarch. The latter accuses Bouvier of enriching himself at his expense by massively overcharging him for dozens of Old Master paintings. He is said to have pocketed more than one billion Swiss francs in this way. Testimonies from people close to Rybolovlev and from art market experts are troubling… Who is telling the truth?