It is good to return someone's lost pet.
Karen is an animal lover who took in a cat and later sees a lost pet poster with the cat on it.
Karen wants to have a pet cat.
Karen returns the cat to the owners and adopts a different one.
Karen decides to keep the cat because she has bonded with it.
The owners of the cat are happy and relieved to be reunited with her.
The owners of the cat are devastated and believe something happened to her.