In West Virginia, Charley "Boomer" Baxter sets off a series of massive mining detonations. Seconds later, a gigantic earthquake rocks the North Atlantic. Within hours, as government seismologist Dr. Amy Lane studies the ghostly landscape, a gigantic aftershock hits. Barely escaping with their lives, Amy and Boomer watch from a rescue helicopter as an enormous crack rushes towards the western horizon. Amy soon realizes that this earthquake has exposed a deep seismic fault that runs across the centre of the North American continent. Now, Amy and Boomer, together with the top government agencies, must race to develop a plan to stop the crack that could potentially tear the world in half.