科学家们发现，宇宙中的两颗彗星正在急速向地球逼近，不出意外的话，它们终将撞上地球，给地球带来无法估量的损失。为了避免造成世界级的恐慌，政府封锁了这一消息，偷偷在格陵兰岛建造了非常坚固的堡垒，只有躲进堡垒的人们才能够获得一线生机，而进入堡垒的条件非常的苛刻。 　　杰夫（杰拉德·巴特勒 Gerard Butler 饰）是一名建筑工程师，他得到了进入堡垒的机会，于是决定带着妻子艾莉森（莫瑞娜·巴卡琳 Morena Baccarin 饰）和儿子内森（罗杰·戴尔·弗洛伊德 Roger Dale Floyd 饰）一起前往格陵兰岛。哪知道旅途进行到一半，察觉到了事件真相的军方开始了暴乱行动。A family fights for survival as a planet-killing comet races to Earth. John Garrity (Gerard Butler), his estranged wife Allison (Morena Baccarin), and young son Nathan make a perilous journey to their only hope for sanctuary. Amid terrifying news accounts of cities around the world being leveled by the comet's fragments, the Garritys experience the best and worst in humanity while they battle the increasing panic and lawlessness surrounding them. As the countdown to global apocalypse approaches zero, their incredible trek culminates in a desperate and last-minute flight to a possible safe haven.