They thought they were safe. They were wrong.

CONTAIN (BUNKER 12 series pilot)

Three years. That's how long Finnian Bolles has been hiding inside the impregnable walls of the hydroelectric complex known as Bunker 8. Three years, with enough resources to last him and the other thirty survivors three more.

But then a series of disturbing events culminates in the sudden appearance of a stranger at their door. Before he too falls victim to the mysterious sickness known as the Flense, he warns them of a fate more horrific than the one they've been avoiding. But to prevent it, they must leave and seek a place many insist doesn't exist, a mythical twelfth bunker.

Requiring no more than the slightest skin-to-skin contact, the Flense spreads with ruthless speed and stealth, decimating mankind before it's even aware of it. The infected are turned into soulless creatures, Wraiths, which wreak destruction upon anyone and anything in their path.

Secure inside ten isolated bunkers are Humanity's tattered remains, each working tirelessly to unravel the mystery of the scourge. But the bunkers were never meant to protect forever. In fact, they were never meant to protect at all.