If keeping track of the identity swaps in the base game mysteries wasn't mind-melting enough, there's this extremely meta DLC case. A group of actors come to a hotel to perform a crime drama script, which turns out to be based on a real group of criminals who carrying out the deal in the script simultaneously with the rehearsal. Once you solve that mystery, an epilogue reveals that this story itself was a fictional TV show (but still based on real events), and the "real" gang are also actors, but this fake plot is exploited to cause a real murder. On top of that, you have meta references to the format, casting, and stories of the base game (including this one). Whew!