After her village is wiped out by what appears to be a savage storm, young Cheyenne Dani Moonstar (Blu Hunt) awakens in a school/ hospital/ prison for young mutants run by Dr. Cecilia Reyes (Alice Braga).
Dani is, of course, a super-powered mutant ala the X-Men, just like fellow inmates Illyana Rasputin (Anya Taylor-Joy), who can teleport and generate a mystical ‘soulsword;’ Sam Guthrie (Charlie Heaton), who can rocket through the air like an invulnerable cannonball; Rahne Sinclair (Maisie Williams), a mutant werewolf; and Roberto da Costa (Henry Zaga), whose body becomes super-hot.
However, the exact nature of Dani’s powers is still unknown, which is a bit of a problem seeing as whatever wiped out her village seems to be coming back (you didn’t really think it was just an extreme weather event, did you?) and besides that, Reyes’ hospital is a far more sinister joint than Professor Xavier’s School for Gifted Youngsters. What exactly is going on here? And can these new mutants overcome their differences and distrust in time to find out?