Five young mutants, just discovering their abilities while held in a secret facility against their will, fight to escape their past sins and save themselves.

Blu Huntas Dani Moonstar
Charlie Heatonas Samuel Guthrie
Maisie Williamsas Rahne Sinclair
Henrique Zagaas Roberto da Costa
Anya Taylor-Joyas Illyana Rasputin
Alice Bragaas Dr. Reyes
Adam Beachas Dani's Father
Happy Andersonas Reverend Craig
Marilyn Mansonas Smiling Man (voice)
Peter Deming