Wolverine, Iceman, Banshee and Sunfire storm Genosha! What new surprises await them in the island nation now ruled by their greatest enemy, Magneto? Will Banshee and Sunfire be able to stop Polaris and Iceman before they too are transformed by Belasco? And how will Polaris react to her former teammates invading her newfound home? It's civil war, X-Men style!