Five years have passed since Sarah Edwards lost her mother and almost destroyed the world. Now, on the run from those that would use her growing unnatural powers to finish the job with what remains of her broken family, a call for help from the beyond echoes in her dreams: Sarah's mother Lilian is alive inside the Rend, trapped in unending torment.

Sharing these dreams and hellbent on saving his lost wife, Sarah's stepfather Marcus leaves to investigate a possible means of rescuing Lilian, leaving Sarah and Tia to fend for themselves while the viels close in.

The Greater's call is getting harder to ignore. And a new threat is hiding in the shadows. Safety awaits in London if the girls can outrun the monsters chasing them… and if they are willing to pay the price.

Reuniting with old friends, the young women launch on an international journey to save their family and stop the apocalypse (again). SALT+FIRE continues the Edwards family's adventures and proves that even trusted allies can become the vilest enemies.