Speculative fiction is a broad umbrella category of narrative fiction referring to any fiction story that includes elements, settings and characters whose features are created out of imagination and speculation rather than based on attested reality and everyday life. That encompasses the genres of science fiction, fantasy, science fantasy, horror, alternative history, and magic realism.
A group of friends, misfits and outcasts who, during high school, had
indulged in bizarre orgies of black magic and forbidden sex, reunites
to try to raise the dead, but their experiments unleash hungry,
bloodthirsty corpses that stalk the living.