Not a Triffid, more mobile and intelligent. The plants are spreading. Faster than a bird in flight. Trapping creatures and absorbing them. Think intelligent pitcher plant. The larger they grow the bigger their prey. Human victims have been caught out in the open, trapped in cars, trains and buses. Now the plants are surrounding our homes. Green walls with sinister intentions.

Against it? Nothing at the moment. Television and satellite signals have been cut. All countries are separate. Where the climate is warming the aliens grow faster. Only in the far north and south are possibilities of a fight back. Who will survive?