An adaptation of the novel Thunderwith by Libby Hathorn: Gladwyn and Larry Ritchie lead a hard life raising palm trees on a farm in the Australian outback. They struggle daily with the elements—and the bank—to keep a roof over their heads and to feed their three children. Despite the hardships, they are a close-knit, happy family until one day when an unsettling letter arrives. Larry's first wife has died and his daughter Lara, 15, is coming from the city to live with the Ritchies. Gladwyn resists the idea of Lara joining the family. She fears this city girl may have a negative influence on her three children. Even more importantly, she worries that Lara's presence may rekindle memories in her husband's mind of his first wife and former life. When Lara arrives, she senses that she isn't welcome in the Ritchie home. As she tries to find a place in this new family, she finds comfort in the company of the stray Dingo dog which she names Thunderwith.