The Butchers (2014)

While on a bus with his brother, Brian, and a dozen others, Simon has a nightmare about when he fatally clubbed his abusive father, who had killed their mother. In a nearby ghost town, the landowner meets JB, a lawyer who wants to buy the property, primarily for its museum dedicated to serial killers: Albert Fish, John Wayne Gacy, Jack the Ripper, Jeffrey Dahmer, Ed Gein, and the Zodiac, "The Death Factory". When the landowner refuses to sell the museum along with the rest of his property, JB stabs him, then prepares an occult ritual with a Book of the Dead, and blood samples taken from the displays in the Death Factory.

Elsewhere, the bus Simon is on breaks down, so he and the other passengers go in search of aid while the driver remains with the vehicle, which he disappears with after the group leaves. The passengers reach the ghost town, and while the others debate what to do, Star and Ren wander off, and uncover JB's belongings. For fun, the duo read from the Book of the Dead, unintentionally resurrecting Fish, Gacy, Dahmer, Gein, the Zodiac, and the Ripper, who is revealed to be lesbian.

While JB fights to flee from Fish, Star is killed by Gein, and Ren is slain by the Zodiac. Simon is then attacked by Fish, whose neck he breaks, causing Fish to disintegrate into a dust that enters Simon's body. The other murderers, who begin succumbing to infighting, continue to run amok. Gacy stabs Bill, the Ripper dismembers Nicole, JB guts Candi, and Gein stabs Dahmer, and then is bludgeoned by JB.

Simon stabs Gacy and the Ripper, and absorbs their "power" like he did Fish's, Gein did Dahmer's, and JB did Gein's. Simon, Brian, and the remaining passengers, are then confronted by JB, who impales Simon, though his friends resurrect him with the Book of the Dead, giving Simon the chance to snap JB's neck. Simon is then overpowered by the Zodiac, who the others set on fire, and hit with the landowner's car, which they and Simon drive off in.

The bus driver, who is implied to be Satan, reappears, and revives JB, noting, "You think you can steal from me, and there won't be Hell to pay? Or should I say, repay? C'mon, son, you've got work to do."