Here is the synopsis taken from IMDB.com...
*** In a world where mutated humans are treated with distrust and fear, an institute for mutants battles to achieve peaceful co-existence with humanity. ***
Sounds sort of generic and vague, but it's pretty much a bunch of mutants on the run from the law, and they take in two younger mutants who have not fully grown use to their powers. Notable mutants from the X-Men comics include Lorna Dane/Polaris, John Proudstar/Thunderbird, and Clarice Ferguson/Blink.
The pilot episode is directed by Bryan Singer, and he directed "X2: X-Men United" (2003) and "X-Men: Days of Future Past" (2014).
This is one to watch!