What makes a bad idea?

My basic idea for my story is connection, connection in the world such as this one. I wanted to show how small the world can be. It doesn't fit F.I.T. It's a total diffrent story, for once. It's written in third person view through first person. Also, it could be true, i just don't know if it is. And i don't think it's an existing idea. The world in the story is the real world, not your fake, everythings great story. In my world, bad things happen to good people and do what they must to make themselves happy. In the world in the story, it's a familiar one. It's active to an extent to where they act normal, they're not chasing to stop a nuclear bomb from going off, they are normal active people. There is a goal or what i like to call a lesson. And the stakes are life and death but mainly death is the high stake. Being caught is the high stake. So i think my story is a good story.