Harry Friberg photographs a mysterious lightning in the water outside the Blockhusudden. The light turns out to flow over a murder.
Örjan Ramberg
as Harry Friberg
Stig Grybe
as Vesper Johnson
Marianne Stjernqvist
as Clara Lessler
Heinz Hopf
as Nils Lessler
Marika Lindström
as Mary Lessler
Carl Billquist
as Leo Lessler
Lotta Ramel
as Helen Lessler
Märta Dorff
as Hilda Tapper
Lennart Tollén
as Sven Lessler
Mikael Rundquist
as Gilbert Lessler
Hans Bendrik
as Clason
Susanne Barklund
as Lena
