Uma terrivel ameaça paira sobre os mundos da Federação: os romulanos começaram a capturar vulcanos e usar seus tecidos cerebrais para obter poderes telepáticos extraordinários; Ael t"Rlailiiu, inimiga de longa data do capitão Kirk, percebe que esse poder, sem a disciplina mental vulcana, representa um perigo para o próprio Império Romulano; Surge, assim, uma estranha aliança entre Ael e Kirk, para tentar resgatar os prisioneiros vulcanos

Dr. McCoy finds himself trapped deep within the Romulan Empire and sets out to escape with the help of a female Federation spy

Something stopped Nita's hand as it ran along the bookshelf. She looked and found that one of the books had a loose thread at the top of its spine. It was one of those So You Want to Be a . . . books, a series on careers. So You Want to Be a Pilot, and a Scientist . . . a Writer. But this one said, So You Want to Be a Wizard.

I don't belive this, Nita thought. She shut the book and stood there holding it in her hand, confused, amazed, suspicious—and delighted. If it was a joke, it was a great one. If it wasn't . . . ?

Coming to the aid of a wounded whale, Kit and Nita are plunged into deep wizardry. The whale is a wizard, and she enlists Kit and Nita in battle against the sinister Lone Power. Becoming whales themselves, Nita and Kit join in an ancient ritual performed by whales, dolphins, and a single fearsome shark. But which poses more of a danger: the Lone Power, or ed'Rashtekaresket, the enormous shark as old as the sea?

Ael t'Rllaillieu is a noble – and dangerous – Romulan commander. But when the Romulans kidnap Vulcans to genetically harness their mind power, Ael decides on treason. Captain Kirk, her old enemy, joins her in a secret pact to destroy the research laboratory and free the captive Vulcans. When the Romulans discover their plan, the Neutral Zone seethes with schemes and counter-schemes, sabotage and war!