The rich oil baron, Victor Glibstone, is plotting to sink one of his tankers and claim the insurance money. He has ordered his henchmen to take the captain and crew of the tanker prisoner and steer the ship towards the nearest reef. When the harbour master realises what is going on he tries to alert the authorities but nobody takes him seriously. Pigeon Boy is called upon to convince Victor of the error of his ways and avert a serious environmental crisis.