X-Men

When a mutant high school student named Hisako Ichiki goes missing in Northern Japan, her parents ask Professor Xavier for his help. Sensing that Hisako's disappearance is of great importance to mutantkind, Professor X gathers his X-Men together.

The X-Men, led by Cyclops, travel via Blackbird to Japan. During their search for Hisako, they discover that she is not the first Mutant to have gone missing. As they move ahead with their investigation, they also learn that the local people are extremely prejudiced against Mutants.

While searching the U-Men's headquarters, the X-Men find Hisako and Emma Frost, a mutant with the power of telepathy. Cyclops claims that Emma was the principle cause of Jean's death one year earlier.

After the X-Men destroy the U-Men's hideout, Emma's body transforms into a diamond-like consistency while protecting Hisako from a laser beam fired by the dying Todd. This is known as “secondary mutation” amongst the Mutants.

Professor Xavier decides to announce Hisako and Emma as members of the X-Men. Cyclops objects to Emma becoming a member as Hisako starts her training as a member of the X-Men.