Six years ago NASA discovered the possibility of alien life within the solar system. Soon after, new life forms began to appear and half of Mexico was quarantined. A probe was launched to collect samples, but crashed upon re-entry over Central America. Today, the American and Mexican military still struggle to contain 'the creatures.' Now a U.S. journalist has agreed to escort a shaken American tourist through the infected zone in Mexico to the safety of the U.S. border.