'Evil Dead' (1980) is Raimi's low-budget gore-fest about a group of American teenage yuppies on holiday in a remote cabin in the Tennessee mountains. They discover an old book which, once they have read it, summons up all kinds of horrors: the trees come alive and so do the dead, who take over the bodies of the living.
In 'Evil Dead 2' (1987) a young couple chance upon the same remote Tennessee cabin as in the original, unleashing the forces of evil with horrific consequences for themselves and their friends. The only survivor, Ash (Bruce Campbell, who also starred in the first film), deranged after having to dismember his possessed, dead girlfriend, fights back with a chainsaw.
Whilst 'Army of Darkness - The Medieval Dead' (1992) is the third in the series. Ash (Campbell) and his chainsaw are transported back in time to the 14th century via an evil book. In his attempts to return to the present he has to battle skeletons and Dark Age warriors, as well as romancing a medieval damsel.