Aversion (film)

Aversion is a 2009 horror film about a private investigator who discovers too late that the woman he is hired to follow is often possessed by a demon.

Alex Stokes Andrew Roth is a selfdestructive, downonhisluck investigator who takes cases wherever he can. When a mysterious man offers him a healthy sum to follow his beautiful wife Claire Melantha Blackthorne, Alex cant resist. Her seemingly mundane daytoday activities take a strange turn when she tries to kill herself.After saving her, their chemistry proves too much to resist and they become romantically entangled. But the fun has just begun as her demonic possessions escalate and Alexs entire town gets sucked into a vortex of evil. Can one lost soul get it together in time to save mankind? ........

Source: Wikipedia