Super Short Summary

In The Mark, the Antichrist Nicolae Carpathia, now possessed by Satan, declares that all remaining humans must receive a "loyalty mark" of 666, under threat of execution. Christian David Hassid learns of his wife's death and joins the Tribulation Force. Rayford Steele and Albie rescue Hattie Durham, and David covertly works against Carpathia's regime until escaping with allies.