Ten-year-old Mia Owen moves from London to a remote South African farm with her parents who run a lion breeding business. Life takes a dramatic turn when a rare white lion cub named Charlie is born. As Mia struggles to adjust to her new environment and the challenges of farm life, she forms an extraordinary bond with Charlie. The inseparable pair grow up together, with Mia finding solace and companionship in the lion amidst her struggles to adapt and her strained relationship with her family.

As the years pass, their connection only deepens, but the fragility of their situation becomes increasingly evident. Mia eventually uncovers disturbing truths about the fate planned for Charlie, leading her to confront the difficult realities of wildlife exploitation. Determined to protect her beloved friend at all costs, Mia embarks on a daring journey that tests her courage and challenges her understanding of loyalty and love. Her quest to secure Charlie's future becomes a gripping adventure filled with emotional highs and moral dilemmas.