A large meteorite that crashes in a Southern California desert and explodes into hundreds of black fragments which have strange properties. When those fragments are exposed to water, they grow very large and tall. The fragments also begin to slowly petrify some of the inhabitants of a nearby small town. The story that unfolds becomes one of human survival against an encroaching unnatural disaster, that if not stopped, could become a national ecological nightmare that could pose a possible threat to all of humanity.

References:
https://en.wikipedia.org/wiki/The_Monolith_Monsters