Knocked out of orbit by a rogue comet, the asteroid Vesta rockets towards Earth, to pass by in a heavenly display of fire. Dubbed the party of the century by the media across the planet, thousands gather in cities to watch the spectacle and party until dawn.
A miscalculation sees Vesta crash into Earth and vaporising the Greenland and Arctic ice sheets.
The world is devastated. A wall of water smashes its way through low-lying coastal cities, while a sonic blast of wind destroys almost everything in its path. Mankind is plunged into the stone-age as the power grid collapses with the onslaught of nature.
With the devastation, a new terror emerges. Awakened from their centuries long slumber, an ancient species of humanoid stalks the abandoned transport network beneath the streets of London.
Lexi Keely--an Australian traveller, and survivor--is captured to be used for the monsters' pleasure.
Armed with the barest of weapons, and a group of other captives, she enacts a plan that will save all, or leave them for dead in the obsidian darkness below the great capital.