While on their extraordinary adventure, Blinky and co. come across an abandoned Cuckoo's egg. Flap makes it is responsibility to find an appropriate nest for it. However, this proves to be a difficult job, as Mr. and Mrs. Plover refuse to take the egg, as do the ducks, and Mr. Wren. But what happens when Blinky and the gang spot a bulldozer heading towards all of the birds nests'? Will they try to rescue the eggs? Will they find anyone willing to take the Cuckoo's egg? Will any of the eggs hatch? And of great importance for Blinky and his friends - will they ever get to see Greenpatch again?