Full Smite

Artema, a gardian angel, wakes up in heaven to see Mishael, a pricipality angel and her mentor, standing by. He quickly briefs her and equips her for upcoming training. Artemas is tasked with assisting humans to accept Jesus Christ as their Lord and savior. 
Her first human is Dustin Stillwell, a young adult who is hooked on pain meds and drugs and has turned completely away from God.  Artemas is delighted to help Dustin butt there is a catch, several catches actually; He can't physically see or hear her, demons on earth will stop her at all cost from completing her mission, oh and Dustin only has three days left to live.
 
Can Artemas save Dustin's poor soul?