Garnet and Petunia The Russians

A British seaman has gone missing in Bangkok. A ship has gone missing in China and bodies have been found floating. The sinister third secretary at the British Embassy seems keen for Garnet and Petunia to assist his opposite number at the Russian Embassy in the hunt for the Russian's brother, who was involved in some Russian naval disaster. The trail leads Garnet from the Yellow Sea to balmy Southern Thailand and through borderline-criminal shipyards.