This is a 5th-Edition D&D encounter set to The Shape by Dance With The Dead.
Since the action moves with the tracks, it's built as a Google Presentation where each slide should have all the information needed to run the fight for that track. A lot of the undead abilities unlikely to come up in the scenario have been tweaked or omitted to try and speed up play.
It's probably for levels 5-7, and is a place to stash the McGuffin of your choice behind a fun, combat-heavy encounter set to music.
Keeper & Son (slides)
