Picard and the crew travel back to 2024 Los Angeles in search of the "Watcher," who can help them identify the point at which time diverged. Seven, Raffi and Rios venture out into an unfamiliar world 400 years in their past, while Picard and Jurati attempt to gather information from an unlikely, and dangerous, ally.

Picard discovers an important person from his past may be integral to the divergence in the timeline. Q continues his manipulation of the timeline, taking an interest in Dr. Adam Soong. Seven and Raffi attempt a daring rescue of Rios, while Jurati faces the consequences of her deal with the Borg Queen.