Following their few clues, Biggles and Ginger take off on an aerial reconnaissance. They fly over the island but don't see anything to catch their interest. Then, Biggles swoops low over the huge lagoon to investigate a strange, brightly colored strip on the rim. To his alarm, it proves to be the nesting place of thousands of flamingos. The birds rise in hordes and threaten to wreck the plane by tangling in the propellers...