The first parts of the film were, as suggested, promising; the references to the past and difficult father/son relationships affecting present day father and son (and his separated wife) were promising and the intial murder scenario, although not wildly original, seemed to promise hope.
However, once we reached the halfway stage, cracks began to show, not least with the supernatural element that crept in and as the movies progressed it became less and less coherent until the final scene was absurd in its lurid craziness. The other plot strand (the relationship of the central character with the detective was clumsily done as this was a significant would-be plot twist for the climax.
The fight scenes seemed to belong to another style of movie altogether (and were not particularly convincing anyway) while the use of ‘religious’ unaccompanied choral music as the plot was revealed were just lazy aural clichés.
The utterly ludicrous climax with an implied apocalypse, clumsily tied in with a major solar eclipse brought the film to a ridiculous climax and proved that while mixing genres can sometimes work very well and creatively, this, (Scandi-Noir + end-times supernaturalism) was a fine example of that emphatically NOT being the case.