The brothers Karl and Jonathan Lejon reunite after their short lives on earth in the country of Nangijala, where the time of the fairy tales and campfires prevails. But the idyllic life in the Cherry Blossom valley is threatened by the cruel knight Tengil who, with the help of his fire-fighting dragon Katla, has taken power in the Wild Rose valley and spreads fear and horror around him. Karl and Jonathan, who through their courage called the brothers Lionheart, take up the battle against Tengil and his black-dressed soldiers. Compared to the movie with the same name, this is the 23 minutes longer tv version.