Kuto awoke with a start, his heart pounding in his chest. It took him a moment to remember where he was – Sao Tome and Principe, on an island off the coast of Africa. He relaxed slightly as he remembered that he was staying in a hotel room, not out in the jungle or on some remote beach. But even so, something felt wrong.

He got out of bed and padded over to the window, peering outside. The sun had not yet risen, but there was enough light to see that the streets were empty. No people were walking around or driving cars – it was as if the entire city had been abandoned overnight.

Kuto’s feeling of unease grew stronger as he stared at the empty scene below him. He knew something wasn’t right, but he couldn’t quite put his finger on what it was. Suddenly, a movement caught his eye and he saw someone running down the street towards the hotel.