The devil is hiding everywhere. It seems police procedurals are, too. Ostensibly an exorcism/horror flick, “The Seventh Day” (2021) sets up more like a detective story. The wizened veteran with a cross to bear (so to speak), is paired with a talented rookie who doesn’t know what he doesn’t know. Find-the-bad-guy (and we’re talking about the baddest bad guy of all) hijinks ensue. Was the suspect framed? Is there a dirty cop involved? Substitute priests for police and you’ve got this middling Guy Pearce effort pretty much figured out. It has the audacity to foreshadow a franchise in the epilogue.