Together, these tales feel like the hangover at a wake for mankind. The film’s dusky pastel color palette recalls dying flowers on a grave. Yet, even as the synth score mutters anxiously in the background, Alexander takes a prankish delight in her own doom and gloom.

This is sci-fi cinema of a relatively subtle, intriguing stripe, without the usual emphasis on fantastical or action imagery. Still, it’s slickly engaging enough to please more open-minded genre fans, and brainy enough to attract those who want something other than another laser shoot ’em up.

We meander from one story to the next until every idea, big and small, gets cast aside with childish zeal.

The result is admirable for how grim it is in its multifaceted way, but as a whole, Warning is too disjointed and underdeveloped to really make an impact with its dystopian cautions.

It all works up to an only mildly surprising “shock” ending, which is bad news for all concerned, a twist that would be more tragic if it were possible to feel sorry for any of them.