Murder Party

Murder Party is an American comedyhorror film directed by Jeremy Saulnier. It was shot in Brooklyn, New York. It was given the Audience Award for Best Feature at the 2007 Slamdance Film Festival and screened within such festivals as Maryland Film Festival.

Christopher, a lonely and plain man, finds an invitation to a Halloween costume party entitled Murder Party, on the street. Constructing a knight costume out of cardboard, he makes his way to Brooklyn to attend the party, only to discover it is actually a trap set by a group of deranged art students. The art students are costumed as a gothvampire, a werewolf, a zombie cheerleader, Daryl Hannahs replicant character from Blade Runner, and a Baseball Fury from The Warriors. They intend to commit a murder as a piece of artwork to impress their wealthy and sinister patron. Chris brought along a loaf of pumpkin raisin bread, which one of the students starts to eat. She then reveals that she is allergic to nonorganic raisins, and didnt know about them. The group asks if shell be OK, and she agrees explaining shes only a little dizzy and needs to sit down, however she falls over and hits her head on an axe and dies. The group hides the body, as they dont want their patron to see it when he arrives.The patron comes and has arrived late to the Murder Party and is searching for students to award grant money to. Drugs and alcohol fuel the group as the situation spirals out of their control and Christopher tries to make it home from the Murder Party alive. ........

Source: Wikipedia