Bug Scene keeps on getting deleted when I open the project

When I open project up in unity the whole scene is gone. Just the scene, the assets are still there and everything just the scene. Please help.

 

I recently saw this, people renamed the original SampleScene and got it erased all the time because of GUID issues. If it is the same problem, all you need to do is to delete the scene file and create one from scratch through the menus.

Otherwise, check the editor logs, maybe it says something useful what's happening.