Our heroes feel like heroes again, having saved a boatload of tourists, but all is not well yet because they’re stuck in Pottsylvania, the land where all the people are spies and everything is a secret! And they don’t even like baseball players, Bullwinkle observes with some disbelief when they see "YANKEE GO HOME" signs. But there’s no time to speculate, for they must mount the Great Mooseberry Expedition, but it's going to be harder than ever because their hotel room has been burgled and the thieves have made off with everything, including all the money and Bullwinkle's autographed picture of Sonny Tufts!