Everyone said Cassie was a promising young woman, until a mysterious event abruptly derailed her future. But nothing in Cassie's life is what it appears to be. She's wickedly smart, tantalizingly cunning, and she's living with a secret double life by night. Now, an unexpected encounter is about to give Cassie a chance to right the wrongs of the past in this thrilling and wildly entertaining story.

As the X-Men try to find a mutant that has attempted to assassinate the President, the Academy is attacked by military forces. In the aftermath they join forces with Magneto and uncover a plot to murder all mutants on Earth.