We meet the hero (not yet known as the hero, of course) in the regular world.
This future-hero somehow is drawn an into unknown world where there are previously unheard of powers to be had and crazy adventures to undertake.
Hero chooses to enter this brave new world, where they encounter tasks that must be completed, often with the help of new found friends (who have their own special gifts).
After acclimating, the hero must undergo a particularly difficult challenge in order to receive some kind of vitally important reward (often called 'the boon')
Having valiantly fought to succeed, the hero must now decide if they want to now return home, even though it may mean leaving friends and powers behind. this decision is often swayed by the fact that their spoils of war (boon) can be used to greatly improve the home-world.
Hero faces challenges as they head home.
Hero uses the boon to save the day.
17 Stages of the Monomyth, Paraphrased
The Call to Adventure
Refusal of the Call
Crossing the Threshold
Belly of the Whale
The Road of Trials
The Meeting with the Goddess
Woman as Temptress
Atonement with the Father
The Ultimate Boon
Refusal of the Return
The Magic Flight
Rescue from Without
The Crossing of the Return Threshold
Master of Two Worlds
Freedom to Live
for more information:
(Joseph Campbell's Official Site)
(Joseph Campbell's Wikipedia Page)