A queston of imagination you say!
Maybe I can help. Normally with fantasy there is always a story about a brave knight saving the damsel in distress.
Perhaps you could make it a type of king Arthur quest. Ummm... Let me think...
The knight must find a sacred weapon created by the gods to defeat a monster who has imprisoned the princess aka the damsel in distress he is sworn to protect.
The Standard girls are weak crap gets on everyones nerves I agree... So lets make it interesting, while the knight battles the beast, the knight is captured instead only to find that the damsel has already escaped long ago!
And now it is up to the damsel to save the knight.
The damsel journeys home to say she's okay but now must journey back and fight the beast!
She finds the sword at it's feet and slays the monster.
Add in a group of men who journey alongside the knight and maybe a few women for the quest of the damsel as all the men are captured!
Suggested Ending dialogue:
Knight:
My Hero!
It is possible to do it all in one act. Shade the area where the lair is when not in use and brighten the area that is in use.
In times like this props are key along with quick hands. Background will have to be changed when the lights are low. Never draw the curtains it looks bad, I tend to use lighting, much easier!
I hope this helped!
Eternal commradery-
Aztecs Finest