For twelve years Aina and Whitney have been in exile on an island for a crime they committed together, tethered to a croft by pills they must take for survival every eight hours. They've kept busy - Aina with her garden, her jigsaw, her music; Whitney with his sculptures and maps - but something is not right. And on the day they're meant to be collected for parole, the Warden does not come ... Unsettling and absorbing.