Lazy little mouse used to always be the center of attention, playing the guitar and singing something. And now his new song with a simple motif and memorable words fell to the liking of forest dwellers. Each of them is busy with things to do, and soon our hero is left without listeners. The animals advise him to do something useful too, but the little mouse is not in a hurry to work. Will he be able to overcome his laziness, or will he run through the forest, singing songs?