The rebellious socialist Knut is subjected to a mental evaluation after he assaults a stranger on the street. Psychologist looking track Knuts aggression in childhood experiences while Knut himself sees them as a natural reaction to the class society's oppression.

In a radio studio, an old lecture is re-edited to suit new times and the literary supremacy.

The same movie with the same characters, cast and crew as I am Curious (Yellow), but with some different scenes and a different political slant. The political focus in Blue is personal relationships, religion, prisons and sex. Blue omits much of the class consciousness and non-violence interviews of the first version. Yellow and Blue are the colors of the Swedish flag.