Mr. Stay-Put is a circus clown. He never leaves his house anymore, ever! Not since he had that close call with an elephant. Then one morning, Mrs. Flit-About literally lands on his sofa, out of the blue, turning his life upside down! After a brief stay with the clown, the lady world traveler is off on new adventures. But every day, she sends Mr. Stay-Put a postcard from some far-flung corner of the earth. And then one day, it suddenly stops: the mailman's sick and can't deliver the mail!
Soon, Mr. Stay-Put can't stand it any longer. He decides to risk everything and set out on a great adventure to... the post office! To rescue his precious postcards!