An "elaborate story" means a detailed and complicated tale with many intricate parts and descriptions.
Sentences with «elaborate story»
I'd then make up this whole elaborate story about what I would do if. (mindbodygreen.com)
This kid needs constant sensory input for her brain to relax for sleep, otherwise she's telling elaborate stories to herself and... increasing tension. (askmoxie.org)
While some scammers use elaborate stories to get you to trust them, other. (petesgrillandpizza.com)