Legion follows the story of โDavid Haller,โ a man who believed he was schizophrenic but discovered he might be the most powerful mutant in the world. With help from a team of specialists, David harnessed his unique abilities and learned heโd been haunted by a malicious parasite. Now, David is all that stands in the way of โAmahl Faroukโ from attaining infinite and world-ending power.