The trailer for The First Purge is here, and we are finally getting an origin story for the horrifying night of legalized crime.

The fourth film in The Purge franchise follows The Purge: Anarchy and The Purge: Election Year, though it serves as a prequel, allowing us to bear witness to the first ever purge.

We learn that Dr. May Updale (Marisa Tomei, although with no apparent relation to Spider-Man's Aunt May) was the mastermind behind the experiment, meant to be a "psychological" device. "If we want to save our country we must release all our anger in one night," she explains to a reporter (played by Van Jones).

In the trailer, the inaugural event is met by protests and a gang of neighborhood protectors, while most people's idea of breaking the law involves wild parties. That's when the nefarious New Founding Fathers of America send in the clowns — or the military disguised as citizens — to stir things up. Dr. Updale is aghast, while blood, explosions, and chaos erupt outside.

But the citizens won't go down without a fight.

The First Purge hits theaters on Wednesday, July 4.