Poliana is a kind girl of 11 years old who has seen his world collapse after his mother's death. She's going to live with her aunt Luisa, a rich and severe woman. Having to face all the dilemmas of a new life in the big city, which she never imagined existed, Poliana decides to apply the "glad game", taught by her parents, which consists of having a positive view of everything, even in times of difficulty.