Complex sentence: The narrative follows series protagonist Dean Winchester (Jensen Ackles) as he finds himself in an alternate reality after a confrontation with a djinn; the creature appears to have fulfilled Dean's greatest wish: that his mother had not been killed when he was a child.
Split into simpler sentences: The narrative follows series protagonist Dean Winchester (Jensen Ackles) who finds himself in an alternate reality after a confrontation with a djinn. The creature appears to have fulfilled Dean's greatest wish: that his mother had not been killed when he was a child.