Grandmother Maria, Sam and the riding instructor Kaan are trying together to keep Gut Kaltenbach running, which is in financial difficulties. The ambitious Isabell supports her, although she secretly pursues her own goals. The impulsive Ari comes to riding training in Kaltenbach, where she develops a special relationship with Windstorm, the eponymous horse of the film series, and she also makes friends with Mika. Mika and Ari try to save the estate and protect Windstorm from reckless horse trainer Thordur Thorvaldson.
Luna Paiano
as Ari
Hanna Binke
as Mika
Marvin Linke
as Sam
Amber Bongard
as Fanny
Tilo Prückner
as Herr Kaan
Cornelia Froboess
as Mikas Großmutter
Lili Epply
as Isabell
Sabin Tambrea
as Thordur Thorvaldson
Meret Becker
as Britta
Henriette Morawe
as Tinka Anders
Nina Kronjäger
as Elisabeth Schwarz
Detlev Buck
as Dr. Anders
