Eriko really wouldn't mind being savaged, if it was her best friend doing the savaging …

Eriko's life appears perfect – devoted parents, pristine apartment and a high-flying job in the seafood division of one of Japan's largest trading companies. Her latest project, to reintroduce the controversial Nile perch fish into the Japanese market, is characteristically ambitious. But beneath her flawless surface she is wracked by loneliness.

Eriko becomes fascinated with a popular blog written by a housewife, Shōko. Shōko’s posts about convenience-store food and her messy home are the opposite of the typical manicured housewife. When Eriko tracks Shōko down at her favourite restaurant, Shōko is at first charmed by her new companion. But soon Eriko's obsession with Shōko begins to spiral out of control. How far will she go to hold on to the best friend she’s ever had?