A reporter publishes a misleading story about a Spanish doubloon in her newspaper. Tourists descend on Coral Key Park in a hunt for treasure. Porter knows there is no treasure in the park and finds the tourists to be nuisances. In the meantime, Bud has set sail with Hap to find treasure. Their rowboat strikes a rock and the two are marooned. Flipper leads Porter to the the two friends and they're rescued. Porter then assigns Hap and Bud the task of cleaning up the beaches littered by the tourists.