Captain Kirk encounters Klingons and nocturnal creatures known as Strangers and the sun god himself in a journey of incredible suspense… Inside the hollow shell of a strange, remote planet Kirk and the Enterprise crew discover a planet within a planet… energized by a white dwarf star… a planet like a lost Eden populated by a race of small, gentle, furred bipeds… a planet falling toward a black hole to spectacular peril and inescapable doom…