A small bookstore in the London district of Mayfair. Mrs. Annetta Robington has become engrossed in a fascinating book about penguins and lost track of time. As she leaves the shop, she suddenly makes an incredible discovery: the bookseller is a penguin! The old gentleman denies it but then admits: yes, he is a penguin – one of many who mostly live unnoticed among humans. A cellist with bushy eyebrows, a doorman with perfect posture, an opera-goer in a tuxedo... Now Mrs. Robington sees penguins everywhere. When the secret of this lovable species is at risk of being revealed, Mrs. Robington's moment has come. With a clever plan, she does everything she can to save the birds... A heartwarming story with enchanting illustrations by Isabel Pin.