Purification takes the reader through the protagonists' heroic trials in the Tribulation of the last times, culminating in a divinely sent world-wide Warning to prepare souls for the Second Coming of Christ on the clouds of heaven, by revealing each person's sins and their particular need for repentance. If humanity repents, it will be spared the Great Chastisement, consisting of nuclear war principally in the Southern hemisphere, in which we are told 'nations will disappear in seconds.' The earth's collision with a giant heaven-sent Comet, will affect the northern hemisphere. Catholic prophecies say two-thirds to three-quarters of humanity will perish by these divine chastisements. But Heaven will rejoice at the repentance and salvation of even one soul. Finally, the wicked who refuse to repent, will perish and Satan will be cast into hell with them, until mankind again opens the door to the 'bottomless pit'. After several engagements with the enemy, David and his faithful few are ambushed by seven diabolical assassins: ogres (demons from Hell inhabiting human bodies). In these times the spiritual warfare between good and evil takes on a visible dimension. Faith in God and in the shield of His Providence are the only safety nets. The final atrocity described in Book III is perpetrated by the Evil One; it will shock the reader. David is shattered by his friend's ritual murder, but his Faith sustains him to the bittersweet end. An Epilogue ends Book III. It touches on the pastoral world of those who survive the Chastisement.