Simple.
Had a dream that I fell in love with a girl named Geneviève in a somewhat midsize town in the 60's. She was vivacious, beautiful, strong -- but she fell in with the wrong crowd and became hooked to some sort of drug that came in gumballs. I tried to tell her and convince her to stop, but she would not; the chronology of events took place two times -- in the first, her life was ruined, and she ended up as a hairdresser. In the second run of the timeline, she outright died in the sixties after overdosing. The third time, I intervened myself, taking her entire supply of drugs away and committing her to some sort of rehabilitation clinic. She hated me; I had to wrestle her to the ground once when she got out. But after the bad crowd finally left her, we were together. Eventually, we decided to move to "Miami Vice, Florida" as seen in a brochure. It was hard resisting the bad crowd as they tried to push the drugs on her or debase me for denying her pleasure. Another difficulty came in her obstinate father, who didn't like her. But I was determined, and I saved her life. Again, the difficulty lay in preventing a person from exercising her own free will; the difference was that I had apparently time traveled or something, and knew that she would die. I also told someone else who was fated to die in a car crash about his destiny, and he subsequently skipped town.
It was a strange dream, but the happiness of having her finally quit the addiction and take control of her life was great. After we decided to move to "Miami Vice" (hah), the dream ended peacefully. I didn't even open my eyes; I simply woke up, realized I had an extra consciousness going, and decided all was complete and right with that dream.