Luca and his white dog Baldur have to look after the coloured sheep. The little shepherd leads the green sheep to a very green meadow, but what does this yellow sheep need? A book to read aloud, to look at, to tell stories, a story about colours and dyed sheep, and a game to roll the dice and thread the sheep on a string of wool. Luca moves from place to place, if all the sheep and the dog are threaded before the sun goes down, all the animals can sleep in the barn and the game is won.