Five young mutants, each with their own unique abilities, find themselves held in a secret facility against their will. Struggling to understand their powers as well as the reasons for their captivity, they are overseen by Dr. Cecilia Reyes, a mysterious physician who aims to mentor them and help them harness their abilities. The new inmates include Rahne Sinclair, who can transform into a wolf; Illyana Rasputin, who has sorcery powers and can teleport; Sam Guthrie, who can fly at jet speeds; Roberto da Costa, who can manipulate solar energy; and Danielle Moonstar, whose powers are initially unknown.

As the teenagers bond over their shared traumas and experiences, strange occurrences begin to unfold within the institution's walls. Each of them is haunted by sinister visions and eerie happenings that seem tied to their deepest fears and traumas. The group must confront the dark forces both outside and within, questioning if the facility is indeed a safe haven or if it holds more perilous secrets than they originally thought. They grapple with trust, fear, and the struggle to comprehend the true nature of their abilities, which are unlike anything they've ever seen or experienced before.