`I was wrong, ` said Captain Flint. ` He`s not mad but bad. It isn`t only eggs he wants. He wants to take the credit for it. You`re quite right. It`s up to us, it`s up to the ship, to see he doesn`t.` Dick`s birdwatching discovery turns the cruise of the Sea Bear into a desperate chase. Not only do the Swallows & Amazons have to prove the facts of the case but they also have to dodge the savage natives & evade the ruthless pursuit of a fanatic egg-collector, determined to kill a pair of rare birds & steal the credit. Fortunately, Nancy has a few plans.