I’m not sure I’m going to do this one justice, so I saved it for last (so far). I’m calling it The Big Twist.
- A crime occurs.
- By design or accident, the crime is completely misinterpreted.
- The solver(s) proceeds forward in good faith, as if it were one of the other types of simple mysteries or whatever.
- Discrepancies build up.
- The crime is revealed to be not what it was supposed to be.
- Wrap-up, the end.
A note, the solvers are often in some kind of danger. This is stuff like Shutter Island, Gone Girl, and And Then There Were None.