A teenage amateur astronomy student makes a chance discovery of an unusual deep space phenomena. His tutor witnesses his find and urgently notifies NASA but his sighting is ignored. Fifteen years later NASA's Near Earth Object program detects an immense cloud of unknown matter speeding towards Earth and panicked calculations reveal the possibility of close encounter within weeks. Western governments impose a news blackout whilst scientists scramble to identify the composition of the cloud and its precise trajectory. As the threat approaches, every electrical circuit in the northern hemisphere fails, immobilising transport systems and rendering communications between people in towns, cities and countries impossible. As civilisation descends into chaos, two strangers meet at small Swiss airport - brilliant young astrophysicist Eva Murren and businessman Red Gravely - both desperate to board a last flight to London for different reasons. Unable to get aboard, they form an unlikely alliance, drawing upon each other's skill and knowledge in a desperate attempt to travel across Europe by whatever means they can find. As the couple begin their journey, Earth's most powerful and mysterious force - gravity - increases, and what should have been an easy two hour flight, descends into a seemingly impossible journey........