“Nighttalk” (**1/2 out of four) was an intuitively done suspense psychodrama about a detective (Ashley Bryant) who has to go undercover on a dating app to track down an elusive (and unseen) murderer and finds herself entangled in a dangerous romance with a seductive online user (Al Mukadam) who may or may not be the killer but provokes all sorts of hidden and provocative secrets from her. Film eventually gets lost in its own sordid and muddled entanglements but is sharply written and well-acted and better than most of its ilk. Bryant’s strong lead performance helps you overlook some of film’s shortcomings.