Bruce Campbell reprises his role as Ash Williams, an aging lothario and chainsaw-handed monster hunter who’s spent the last three decades avoiding maturity, and the terrors of the Evil Dead. But when a Deadite plague threatens to destroy all of mankind, he’s forced to face his demons — both metaphorical and literal.

Mia, a drug addict, is determined to kick the habit. To that end, she asks her brother, David, his girlfriend, Natalie and their friends Olivia and Eric to accompany her to their family's remote forest cabin to help her through withdrawal. Eric finds a mysterious Book of the Dead at the cabin and reads aloud from it, awakening an ancient demon. All hell breaks loose when the malevolent entity possesses Mia.

Paul (Macfadyen), a prize-winning war journalist, returns to his remote New Zealand hometown due to the death of his father, battle-scarred and world-weary. For the discontented sixteen-year-old Celia (Barclay) he opens up a world she has only dreamed of. She actively pursues a friendship with him, fascinated by his cynicism and experience of the world beyond her small-town existence. But many, including the members of both their families (Otto, Moy), frown upon the friendship and when Celia goes missing, Paul becomes the increasingly loathed and persecuted prime suspect in her disappearance. As the violent and urgent truth gradually emerges, Paul is forced to confront the family tragedy and betrayal that he ran from as a youth, and to face the grievous consequences of silence and secrecy that has surrounded his entire adult life.

The legendary son of Zeus journeys across the earth fighting monsters and helping people.