Nine years old Karen is the baby of her family, and the delight of her parents and older brother. The only member of her family who doesn't seem to like her is her older, teenage sister.
When Karen and her family move into their new home shortly after the death of a beloved aunt, she soon discovers a 'friend' who can help her get back at her sister and deal with the grief of losing her aunt.
The problem is that Karen isn't sure of how friendly her new 'friend' really is.