Fiction it is. Biblical teaching it is not. A vindictive God battles against a superman Antichrist for the souls of men. The time frame is a future seven-year tribulation in which this vindictive God rains all sorts of horrors on the followers of Antichrist. A gigantic burning mountain and falling stars kill hundreds of thousands.
Fire burns up one-third of the earth.
The horrors continue. The series is not fully released but LaHaye has already told us the outcome. Cataclysmic killings continue. Finally a worldwide earthquake wipes out all the cities, mountains and islands. Whatever people were left cursed God.