Don’t Stop! Green means go.
While looking out a window at night (any environment) the main character sees a green light in a distant window blinking off and on in an irregular pattern suggesting a code or signal. After several nights of observation, the MC goes to investigate during the day, only to find an empty home with no electricity.
A Life Better Lived
A popular well-liked neighbor attends a block-party / neighborhood gathering boasting of his new job promotion, financial security, and marital bliss. It is rumored that he has been fired and arrested for embezzlement, his wife has moved out with their children, and the bank has foreclosed on his house. He seems oblivious to his circumstances, even inviting his concerned and troubled friends over to his (now padlocked) house for an evening of beer and video games. (the story lies in the revelation of circumstances and the friends’ supportive and or derisive reaction)
It Takes a Thief
While perpetrating a covert industrial theft and espionage, the MC discovers the head of the company in a career destroying, compromising position. Both the MC / thief and the company head must depend on the other’s confidentiality to avoid personal ruin.
Behind Closed Doors
After a long, hard rainfall, a sinkhole opens in an open field behind the neighborhood. The crevasse reveals an array of subterranean rooms littered with the bones of tortured corpses. The access tunnel to these dungeon rooms leads to a secret doorway in the neighborhood’s favorite elderly couple’s basement.