This is a sequel to Tam-Tam the Cat. In this story, Tam-Tam and Lulu discover a tiny grey mouse hanging on a little branch while exploring the fence in their backyard. The tiny grey mouse has lost a yellow square cheese with holes in it, and it is so hungry. Tam-Tam and Lulu decide to help the tiny grey mouse find the cheese. Sam, their owner, comes to the rescue by giving the tiny grey mouse a yellow square cheese with holes in it. Tam-Tam and Lulu meow and chirp with excitement, and Sam names the tiny grey mouse Oscar. Tam-Tam and Lulu are happy that they have a new friend to play with.
