After going bankrupt, the King family arrive from England to live with their Australian relatives. The King's think they have inherited a large cattle ranch, but discovery it is a run down Australian wildlife "Wallaby Park".

In England a recently bereaved widow and her two children discover that they've inherited a property in Australia. With some reluctance they head to Australia to claim their inheritance only to discover that the profitable sheep station they've imagined is in fact a rather out of the way wildlife park full of Australian native animals. What's more it has human occupants as well - a distantly related trio of grandchildren who have been bequeathed lifelong rights to live on the property. As well, there's an Australian born Vietnamese animal handler who's somehow the only one who has real expertise in dealing with native Australian animals.

The show is set in Wallaby Park, an Australian wildlife park in the Ku-ring-gai National Park where the King family arrive from England to live with their Australian relatives after going bankrupt. Before they arrive they believe they have inherited a large cattle ranch, but on arrival are disappointed to meet a largely unprofitable, slightly run down wildlife park.