Three inseparable good friends - all three are a little out of the ordinary. It's August, none of them are going anywhere for the summer holidays, they're hanging out together. The summer passes slowly, and eventually it unravels, behind the dirt-cheap bumps lie more serious problems.

Life for former United Nations investigator Gerry Lane and his family seems content. Suddenly, the world is plagued by a mysterious infection turning whole human populations into rampaging mindless zombies. After barely escaping the chaos, Lane is persuaded to go on a mission to investigate this disease. What follows is a perilous trek around the world where Lane must brave horrific dangers and long odds to find answers before human civilization falls.