In a world mostly wiped out by the plague and embroiled in an elemental struggle between good and evil, the fate of mankind rests on the frail shoulders of the 108-year-old Mother Abagail and a handful of survivors. Their worst nightmares are embodied in a man with a lethal smile and unspeakable powers: Randall Flagg, the Dark Man.

Daimon and Ana Helstrom are the son and daughter of a mysterious and powerful serial killer. The siblings have a complicated dynamic as they track down the terrorizing worst of humanity — each with their attitude and skills.

Truly amazing, fantastical, funny, and odd, and sometimes scary, sad, and endearing stories are portrayed. Many famous actors, actresses, and directors make guest appearances.