Daemon Czar has activated the Harmony Grid, and the people of Titan are panicking...

Ever since the meteor NORA struck the planet, plunging what remains of Earth into six months of darkness, the human race has survived in Titan, a purpose-built underground ark.Eden, Elvandra and Ginny are thrust together in their fight for survival as they cross a post-apocalyptic world in search of a newer, better sanctuary.

But with the darkness comes freezing temperatures, an unexpected war with the banished, and hungry, crazed mutants who aren't quite what they seem...

Can you survive the Harmony Grid?

Grab your gear. Secure your weapon. Remember your training. You're about to run for your life with E. Rachael Hardcastle...