Five years ago, when the anomaly arrived, it wiped out eight thousand square kilometers of Toronto, taking with it over seven million souls. It remains now as a looming, impervious black dome. 
Dave Thompson, a hard rock miner, was hired as the lead engineer on Tunnel 18. The job is simple: get the crews to dig fast, and dig deep, avoid the lethal energy discharges, and try not to die in a tunnel collapse. 
But now the energy releases are happening more and more frequently, the miners are refusing to dig, and the government is becoming desperate. Making things worse, there's something they're not telling him. 
If Dave can't get the scientists inside, there's little hope for humanity's survival. And time is running out.​