What's so funny?

All it takes is a few underhanded moves by a tough ex-cop named Eppick to pull Dortmunder into a game he never wanted to play. With no choice, he musters his always-game gang and they set out on a perilous treasure hunt for a long-lost gold and jewel-studded chess set once intended as a birthday gift for the last Romanov czar, which unfortunately reached Russia after that party was over.