Supernatural

While hunting a Djinn [a type of genie], Dean is attacked and transported to a world where his mother is alive, Sam is in law school and engaged to Jessica, and Dean lives a very normal life with his girlfriend. However, after he starts seeing a strange girl and learns all the people he has saved in the past have died, Dean must decide whether he wants to stay in this new safe life where everyone he loves is alive or if he should return to the hunt.