What party-based mission do Seth and Evan undertake in the 2007 movie "Superbad"?

In the 2007 movie Superbad, Seth and Evan undertake a mission to get alcohol for a party. They hope the booze will help make the event exciting and give them a chance to impress the girls they like before leaving for different colleges.

The plan begins when Jules invites Seth to her party and asks him to bring alcohol. Seth and Evan are underage, so they rely on their friend Fogell, who obtains a fake identification card using the name “McLovin.” Their attempt to buy alcohol leads to a chain of comic complications, including Fogell’s encounter with two police officers.

The alcohol mission is the movie’s central running objective, but the story also becomes a coming-of-age comedy about friendship, insecurity, and separation. Seth and Evan have been close since childhood, yet their impending move to different colleges exposes tensions beneath their friendship.

A common oversimplification is that they are simply trying to attend a party. More specifically, they are trying to supply alcohol for Jules’s party, believing that this will help them fit in and achieve their romantic goals.