Mia is 11 years old when she develops an extraordinary relationship with Charlie, a young white lion born on her parents' farm in South Africa. Over three years, they grow up together and become inseparable friends. When Mia turns 14 and Charlie is a magnificent adult lion, she discovers the unbearable truth: her father has decided to sell the lion to trophy hunters. Desperate, Mia has no choice but to escape with Charlie in order to rescue him.