I don't think it's possible to reuse the plan of one story to build all the stories without a major change in the program. But with a plug-in, you could quite easily clone the objects of an existing plan on multiple stories.

Thanks~
I have some questions listed as below:
1. What is the plug-in's name for cloning stories?
2. For my specific requirement, can I develop a plug-in to satisfy it?
3. I viewed the thread [Deploying SweetHome3D, to be embeded in webpage]. Is it ok for us to add self-develop plug-in in to webpage for SweetHome3D?