Custom Map Resetting

I am looking to set up a game mode where players have a plot world to build in, and a city map that they need to loot, break and gather resources in.

Are there any plugins out there that can be set up so that every 24h the city map resets back to its original state and all the chests are full of loot again etc?
or to even have said the center of the city reset once a day and have hard to reach areas that require more planning and time to reach reset every 7 days?

If one already exists please let me know or give a short explanation on how to do it.

Also, no command blocks allowed

How to do it: Maybe with Regions?
Permissions: mr.createmaparea
Commands: /mr create <region> <reset time>
/mr list
When i would like it: ASAP