A former bio-chemist turned music teacher is kidnapped and held for ransom. However the kidnappers are not after money, but his formula for accelerating plant growth.
Jahman is fishing at sea when he is narrowly missed by a cannonball. Suspecting that it had been fired from a nearby island fort Jojo and Ziggy decide to investigate.
Tracks sent into the radio station by local bands are turning up in the US charts. Ziggy is suspected of selling the tracks to the foreign stations for profit.