When the imaginary friends of a young girl living in Australia's Lightning Ridge opal-mining town go missing, the inexplicable illness that befalls her soon prompts her brother to organize a desperate search for his sister's transparent pals in director Peter Cattaneo's adaptation of Ben Rice's popular children's novella. Kellyanne is a young girl with a vivid imagination and two invisible friends named Pobby and Dingan. Though her brother, Ashmol, was never the affectionate type, his concern at seeing his little sister become ill after Pobby and Dingan disappear quickly sets into motion an incredible journey that will serve as a transformative rite of passage for not just Ashmol, but the whole town of Lightning Ridge as well.