Jubilee is attacked by robots called Sentinels at a local mall but she is saved by Storm and Rogue, and taken to the X-Mansion for her safety. The X-Men discover that the group running the Mutant Registration Program intends to track and eliminate mutants. Later, the X-Men find the Sentinel base and infiltrate the base to destroy the files on mutants. The episode ends in a cliffhanger when Storm opens the door to a room where many armed soldiers are hiding, waiting to ambush the X-Men.