

Structured like the ocean’s levels, deepening and darkening the further one descends, the novel slowly reveals that the horrific situation Leah tolerated may not have not been as accidental as it first seemed. When Leah returns home, things do not go as Miri had envisioned her unanticipated transformation-a terrifying dissolution of her human form into something unfamiliar and strange-challenges Miri’s assumptions about the course of their life together. Miri’s narrative and excerpts from Leah’s diary of the mission relate their growing awareness-and grudging management-of the changes and relationship losses they both endure as a result of their prolonged separation. Then Leah, a marine scientist, embarks on a three-week submarine expedition during which things seem to go disastrously wrong, and she and her shipmates disappear for six months at the very bottom of the ocean. Leah and Miri lead a conventional married life of comfortable routine, shared love of movies, and happiness at having found each other.

What happens to a marriage when one spouse is no longer the person you married?
