LOS ANGELES, April 27 (UPI) -- Hokum, in theaters Friday, is an effective horror movie with a challenging protagonist. Lovable Adam Scott embraces his dark side and the film meets him there.

Author Ohm Bauman (Scott) visits the Irish hotel where his parents honeymooned to scatter their ashes. He does not make fast friends with the staff.

Bartender Fiona (Florence Ordesh) tells him the honeymoon suite has been locked for years since owner Cob (Brendan Conroy) believes he trapped a witch there. Ohm is skeptical, but Hokum is a horror movie so there's probably something to the story.

Ohm is abrasive at best and overtly mean when engaged. A bellman (Will O'Connell), who is an aspiring author, is annoying but Ohm humiliates him and then assaults him when he still won't leave.

Since Ohm is a writer, his nastiness has wit. He could use that wit to be friendly, or at least decent, but he chooses poison.