Obsession

Helene and Aldo are trapeze artists in a circus ;the man is injured and has to be replaced by Alex, his former partner who knows too much about him.Alex is murdered ,and Helen is convinced that her husband ,Aldo ,committed the crime.But it's Bernardin ,who has a performing dogs act on the ring ,who is accused of the murder.He is sentenced to death ,and as he has a wife and children,Helene is desperate .Shall she give Aldo away to the police?