When private eye John Hillman is on assignment in London his wife Kajsa visits the Army's riding school at Strömsholm, Sweden. She gets involved in the strange murder of the Blue Rider. Unknown to everyone at Strömsholm.
Annalisa Ericson
as Kajsa Hillman
Nils Hallberg
as Freddy Sjöström
Gunnel Broström
as Elly Weinestam
Bengt Brunskog
as Douglas Weinestam
Björn Bjelfvenstam
as Henrik Löwe
Mona Malm
as Kerstin Renman
Gio Petré
as Git Malmström
Erik Hell
as Kurt Forsberg
Lauritz Falk
as Axel Weber
Olof Huddén
as Rutger von Schöffer
Lennart Lindberg
as Nelson
Kotti Chave
as Sune Öhrgren
