A story of family and friendship. Amy is 9 years old and doesn't understand why her mum and dad need another baby in the family as she already has a younger sister called Lara. They have to go to their mother's friend's house to stay. It all seems fine until something not very good happens to Lara.
The star of the story is Choc- the Chocolate Dog in the title, who gets his name because his coat is as brown as chocolate and his favourite snack is chocolate.