Sando and Hedda are running for their lives. They break out of Sydney, the walled city of 2075, into an Australia decimated by civil strife, rising salt levels, ravaged ozone layer, and daily temperatures of fifty-seven degrees. Their flight to this salt-encrusted otherworld forces them to face its unimaginable inhabitants, bred in a secret weapons laboratory, while they themselves struggle to hold on to their love for each other and for the truth in a gripping battle against an ancient human evil with a terrifying future face. A dazzling and haunting novel from the bestselling author of FORTRESS.