Commander Una faces court-martial along with possible imprisonment and dishonorable dismissal from Starfleet, and her defense is in the hands of a lawyer who’s also a childhood friend with whom she had a terrible falling out.

Returning to a planet that dredges up tragic memories, Captain Pike and his landing party find themselves forgetting everything, including their own identities as he confronts a ghost from his past.

Uhura seems to be the only one who can hear a strange sound. When the noise triggers terrifying hallucinations, she enlists an unlikely assistant to help her track down the source.

Pike leads a risky rescue behind enemy lines as the landing party flees a deadly enemy.

Pike and M'Benga enter Klingon space for Batel's cure as M'Benga's past returns on a deadly world.