Actually this is not a horror movie. This can be classified as Surreal Fantasy. So we need not worry about a proper story or explanation for everything. This movie is dreamlike with a tint of creepiness. Those are the key ingredients of a surreal movie. This movie has those key elements. So it is throughly enjoyable to a surreal fan like me. So friends, don't care about negative reviews. If you are a surreal / fantasy fan, you will definitely like this movie.

Martime the attractive french protagonist woman in this movie is in with the mob and has agreed to take half of the loot from a robbery to a warehouse and instructed to stay low for a few days until the mob arrive. Once she gets there Martime appears to have a show down with her own conscience.

So this is how it goes. On her arrival at the warehouse she is spooked by a pair of laughing vagabonds with a German Shepherd. Afterwards she finds that she has been mysteriously locked inside the warehouse and she begins to experience panic attacks. Then we get a well dressed mute who turns up out of nowhere (clue?) and we are lead to believe that he isn't quite real or maybe the product of her repressed childhood memories.

We see later how this could be as we are introduced to various dream sequences of her childhood which get overlapped with her daytime reality (nicely contrasted) and we learn that her father was a very unpleasant and abusive man who treated her and her mother very poorly and that she appears to have set her dog on her father at some point in her past which just happens to have also been a German Shepherd which I have to admit made me laugh, I know I have a bad sense of humor.

Was the dog that was owned by the vagabonds that spooked her earlier on her arrival what triggered her childhood memories? My bet is yes. This is the bit I believe most viewers didn't pick up on.

Continuing, so a depiction of her confronting this nightmarish past manifests into a physical confrontation played out in the warehouse with Martime fighting the mute and causing some nasty lacerations to each other. Later her childhood former self turns up out of nowhere (clue?) where they jointly dispatch this mute monster using their natural psychic powers (does she even have powers?). Not long later her mob buddies turn up and do what you probably guessed they would do all along.

In the end we get the biggest clue of all with a poem which is open for interpretation. The following is my interpretation.

The story is about our own monsters, monsters that exist in both the shadows of our mind and in plain sight (the light of day) and that there is much we have to learn from them.

The monsters in the shadows were the abhorrent memories of Martime's father and the monsters in the sun (plain sight) were the mobsters she is dealing with. All the betrayal at the end is the reason for our need to learn from them (our monsters).

Clash has a good story with a strong moral. Its told in an abstract way which has clearly missed the mark with many viewers thus it is in my opinion highly underrated. The end.

The main issue with this movie is nothing happens, it started off good but could have been sooo much better.

A part from a few gory effects not even worth to mention its more of a descent into craziness then anything else.