The world will finally see much of Robert Mueller’s long-awaited report on Thursday morning.

The document — stretching nearly 400 pages — will lay out, with some redactions, the special counsel’s findings after nearly two years of investigations.

Some passages will likely rehash and round up information that’s already in the public domain. Mueller has indicted 34 people and companies, and filed thousands of pages in legal briefs that all exposed slivers of his probe. But the report is also expected delve into the crevices of the investigation, detailing findings that the public — and even President Donald Trump himself — have never seen.

With just hours to go before the report is released, we’ve compiled a handy compendium to get you up to speed on the intertwined storylines, subplots and characters that could show up in the report.