Like many children, Helen dreamed of a kitten. But my mother was against, so they agreed: Helen will stop asking for a pet, but will be able to help her cousin Lucy in the veterinary clinic. One day Helen and Lucy picked up a kitten on the street, who was hit by a car. Life was saved, but his master was never found. They could not leave the kitten in the clinic, but he needed special care until he finally recovered. The girl had to break a promise and ask her mother to temporarily shelter the kitten. Fortunately, my mother agreed, and the baby, whom Helen called Silver, moved in with them. But how can Helen now admit to her mother that she dreams of becoming Silver's new mistress? So that their home becomes for Silver not temporary, but permanent?