The Razor.

Short story idea. Protagonist lives alone, in a small house in the suburbs. Nothing happens to protagonist by coincidence. There are no accidents at all. Absolutely everything in protagonist's life is the result of not one, but many (possibly interlocking) conspiracies by the Mafia, the Yakuza, the Illuminati, the CIA, the ASPCA, the KGB, the Teamsters, the Colombian Cocaine Cartel...

and it all looks to protagonist like the sort of thing that everyone else takes for granted, so why not?

Lost your keys? It's because the Boy Scouts are making duplicates. They'll show up again in a plausible place. Bad traffic on your commute? Arranged by the Society of Women Engineers to slow you down. Big sale at the supermarket? The CIA wants you to eat more kale.

Und so weiter.

The Razor.

Short story idea. Protagonist lives alone, in a small house in the suburbs. Nothing happens to protagonist by coincidence. There are no accidents at all. Absolutely everything in protagonist's life is the result of not one, but many (possibly interlocking) conspiracies by the Mafia, the Yakuza, the Illuminati, the CIA, the ASPCA, the KGB, the Teamsters, the Colombian Cocaine Cartel...

and it all looks to protagonist like the sort of thing that everyone else takes for granted, so why not?

Lost your keys? It's because the Boy Scouts are making duplicates. They'll show up again in a plausible place. Bad traffic on your commute? Arranged by the Society of Women Engineers to slow you down. Big sale at the supermarket? The CIA wants you to eat more kale.

Und so weiter.