The plot concerns a comet hurling toward Earth on a collision course and the different reactions to people on the impending disaster. The plot concerns a comet hurling toward Earth on a collision course and the different reactions to people on the impending disaster. The plot concerns a comet hurling toward Earth on a collision course and the different reactions to people on the impending disaster. The plot concerns a comet hurling toward Earth on a collision course and the different reactions to people on the impending disaster.