Primal

Presumed dead, a group of undergraduate students who go missing on a deserted Pacific island emerge one year later in two groups of ragged (and naked) survivors. All but one of the surviving women have conceived, and two students, plus their professor, are said to have died.

In the glare of the world's media, every survivor sticks to the same unconvincing version of events. Piece-by-piece the narrator examines the evidence and conducts interviews with the survivors, to work out exactly what...