The tragic death of a student at the Xavier Institute reveals that a powerful enemy is working from inside the mansion to destroy the X-Men; an enemy that knows all of their weaknesses and can predict their every move.
The heroes protect people from a monster; a depressed mutant teenager tests his power.
A fellow student dares Wing to test his lost power resulting in his death.
The students start to panic when they realize Wing is missing.
A Sentinel reawakens and seeks to destroy the X-Men.
Despite being in the Danger Room, the students are threatened.
The X-Men try to save the students in the Danger Room.