Doctor Huxton Rymer is always looking for the easy money. In this story he arrives in Cochin, India with Mary Trent after their small ship flounders in an adventure. Here he finds a 'Coconut Pearl' and this gives him a new idea. But as so frequently happens, the master detective, Sexton Blake and assistant, Tinker arrive at the same location to assist with a copra business. Suspense and thrills follow the heroes and villain in exotic India.