The world changes overnight when mutant abilities begin manifesting on a mass scale. Governments respond with fear, surveillance, and militarization, while the public debates whether mutants are the next step in evolution or the end of humanity. As mutantkind emerges into global awareness, Professor Cassandra Xavier forms the a group of heroes known as X-Men to protect a world that fears them. But when Magneto rises with a radical vision of mutant supremacy, the future of humanity and mutantkind hangs in the balance.