Out on the wide red plains of Notawallop Creek Station, nine-year-old Mack's world feels safe and steady. Every morning he wakes to the gentle Heartbeat Hum of his best friend, Dozy the emu — a sound that means home, comfort, and unbreakable friendship. But when poachers strike and Dozy vanishes into the night, Mack's world is thrown into silence. With Chrissy, his fearless cousin, and their loyal kangaroos by his side, Mack must find the courage to track the men who stole his friend. From dusty creek beds to a hidden campfire deep in the bush, every step brings danger closer — and tests their bravery to the limit. Full of humour, heart, and high adventure, Mack and the Heartbeat Hum is a timeless Australian story about family, loyalty, and the fierce love between children and their animals. Will Mack find his voice — and bring Dozy home before it's too late?