Tintin and Snowy are in India, guests of the Maharaja of Gaipajama, enjoying a well-earned rest. The evil gang of international drug-smugglers, encountered in 'Cigars of the Pharaoh', has been smashed and its members are behind bars. With one exception. Only the mysterious gang-leader is unaccounted for: he disappeared over a cliff.
But questions have still to be answered. What of the terrible Rajaijah juice, the 'poison of madness'? Where were the shipments of opium going, hidden in the false cigars? And who really was the master-mind behind the operation?