In the wake of the death of Warren's mother the X-Men return home only to discover Lorna and Alex have left to investigate a Cerebro reading of newly discovered mutants. The rest of the team heads to the Himalayas to follow them. With the mansion deserted, a mysterious figure sneaks through the defenses around Xavier's school. While looking around inside he finds Avia, and decides to take her hostage. Lorna and Alex's Sentinel ship has been knocked out of the sky by giant boulders. The same fate meets the X-Men's ship and they discover that Yeti, a former member of First Line is throwing the rocks. The attempt to subdue him when the Inhumans arrive and help put him to sleep. Yeti had apparently gone insane after the Skree he loved was killed. Realizing that Cerebro had detected the Inhumans and not actual mutants, the X-Men return home where they are confronted by Kraven the Hunter who is holding Avia hostage. — Description from Comic Vine community (comicvine.gamespot.com).
