For Peter, its a glorious day of scuba diving off the coast of Devon. Suddenly he sees a flash of bright light above the water but thinks nothing of it. Little does he realise that something catastrophic has happened, something that will change his life for ever.

We follow his adventures with his girlfriend, Tammy, as they cope with a world where almost every human being has perished. Peters skills as an amateur radio operator come in very useful when he picks up a message from the crew of a scientific space station, who have also survived.

The crew reports the existence of large ant-like...