Sorority Party Massacre is a 2012 horror film written and directed by Chris W. Freeman, co-directed by Justin Jones and starring Eve Mauro and Ed O'Ross.
Every year, Stella Fawnskin selects seven members of Sigma Phi Pi, a sorority with chapters all over the United States, to compete for the Fawnskin Grant. On her way to Stella's ranch, which is in the isolated resort town of Grizzly Cove, grant contender Holly Fanning is killed at a deserted rest area. The next day, Detective William Watts is informed by Holly's father, Captain Dan Fanning, that he is being suspended from the LAPD due to his repeated use of excessive force. When Dan, who is protective of his daughter, mentions that Holly has not yet checked in with him, Will offers to go to Grizzly Cove to keep an eye on her, in exchange for Dan helping him get back on the force.
Will is ferried to Grizzly Cove by Kreeger, and meets with Sheriff Barney P. Lumpkin, and Deputy Lang. The three go to Stella's ranch, and speak with her, the six other girls (Paige, Brooklyn, Veronica, Jessie Lynn, Kioko, and Sloan) competing for the grant, and Stella's "mongoloid" handyman, Aggo. They all claim to not know where Holly is, so Will does a bit of research, and discovers that sorority girls have been vanishing in and around Grizzly Cove since at least the 1980s, news which shocks Barney, and Lang. Will tries to call Dan, but the police station's line has been sabotaged, leaving the town's only functioning telephones in the possession of Stella, and Mayor Carson. Will, Barney, and Lang travel to Stella's ranch, arriving just as the body of Veronica, who had been murdered with bees, is uncovered. Upon discovering that Stella's phone is dead, Will takes charge, sending Barney to Mayor Carson's house, and Lang to Kreeger, instructing the deputy to have Kreeger ferry her to someone who can get her in touch with Dan.
Barney returns from Carson's house, claiming to have found the mayor's severed head there. He and Will then venture to the dock, where Lang is dead in the water, and the frightened Kreeger is fleeing the scene. The law enforcement duo go back to the ranch, and are unable to stop someone from hanging Stella. Everyone, minus the missing Kioko, gathers in the dining room, but they become separated due to panic caused by the power going out, and Kioko's corpse being found in the refrigerator. During the chaos, Sloan is set on fire, and burns to death.
Elsewhere on Stella's property, Brooklyn stabs Jessie Lynn in the head. Following a bloody trail leading from Jessie Lynn's remains to a hidden chamber, Will finds Brooklyn and Barney tied up. Barney tricks Will into incapacitating himself with a bear trap, and releases and threatens Brooklyn into going after Paige and Aggo. Barney takes Will to the dock, and informs him that he is the one who has been murdering sorority girls over the past several decades, inspired to do so after helping cover up Stella's murder of her rival, who, unbeknownst to Barney and Stella, was the aunt of Brooklyn. Back at the ranch, Paige and Aggo (who is really a con man named Brian) are chased by the axe-wielding Brooklyn, who hates "sorority bitches" and was the one who hanged Stella. Paige fights Brooklyn, and asphyxiates her.
When Barney finishes gloating, Will grabs a speaker and presses it into Barney's chest, causing Barney's pacemaker to malfunction, and seemingly kill him. Will is joined by Paige and Brian, and together they ready Kreeger's boat to take them to aid. Will is content that everything is over, until he notices the bee stings on Paige's arm. Realizing that the detective is on to her, Paige knocks out Aggo, and throws Will overboard while claiming that she only intended to scare Veronica, not kill her. Will manages to knock Paige into the water, and drown her. Later, while using his precincts' washroom, Will is taunted and mocked by an obnoxious rival detective, who he gives a swirly just as Dan walks in.
In a post-credits scene, Barney is shown recovering, and it is announced that "Detective Watts Returns in Bachelorette Party Massacre".