Greys: Shattered Remnants in Bloomington, MN

Sam woke to find she had no memory of who she was, where she was, or even the identity of the corpse she was sharing a bed with.
Filled with fear, she stumbled out of her flat into the streets of Westminster, London. People lay dead all around, while others still alive, staggered aimlessly in confusion. Towering walls of what could only be described as 'Nothing' ripped through the streets. Anything and anyone that touched them simply ceased to be.
Then came the flying disks, and with them, the little grey men and their fearsome dogs - and the abductions began.
Haunted by the idea of a man who had never existed, Sam must struggle to understand what cataclysmic disaster has ruined her world. Finding herself forced into a most unlikely alliance, together with her newfound friend, she must decide the very fate of the universe.