When her family decides to leave London to move to Africa where she is going to take care of a lion farm, Mia, a 10-year-old girl, sees her life upside down. But when a gorgeous white lion is born on the farm, Charlie, the sun rises again in the path of the Lamb, who regains his happiness and binds with the splendid lion cub, an extraordinary close friendship.
But when Charlie reaches three years, Mia again has a shock: her father was hiding her secret. Desperate by the thought that Charlie might be in danger, Mia decides to run away with him. The two friends start on an incredible journey through the savannah of South Africa in search of another country where Charlie could live freely.