A Diamond Disappeared in the Hong Kong Night Sky

Lupin and Jigen search a smuggler's ship disguised as police officials, but find only thousands of chickens, not the diamonds they expected. Even though they infiltrate Dragonbaum Garden, lair of the smuggling boss, Kou Chin Ko, they can't find hide or hair of the diamonds, which are being sold undercover of a martial-arts tournament. What will the chickens lay for Kou's favorite egg dinner?