Missing out on "The History of Ice Cream," the study group left with no option but to take a real, legitimate history class. Their professor is Greendale's newest edition, the stone-faced Professor Cornwallis. He's ready to crack the whip and get down to business and assigns their first test for the following Monday (no dioramas in this class!). Professor Cornwallis proposes an interesting question for their first essay prompt: History is always told from the eyes of the victors. How would the story read if it was told by the vanquished?
This question especially strikes a chord with the German trio who terrorizes the study group. After their last encounter with Jeff and the gang, things were left on a sour note. But this battle is far from over, especially now that they've been instilled with a new taste for revenge.
Meanwhile, a representative from Greendale mental health services surprises the Dean by showing up with an amnesia-stricken Ben Chang in tow. Now named "Kevin," he was traced back to Greendale by a note written on Greendale stationary. His affliction, which he refers to as "Changnesia," leaves him with no memory of terrorizing Greendale; in fact, it leaves him with no memory of his previous life whatsoever. The specialist insists that Greendale is the prefect environment for "Kevin" to have some immersive therapy. The Dean understandably resists, but the school board already signed off on it!
The study group arrives at their home base to find none other than the Germans in their beloved study room. They're incredulous, but realize that they're the ones in the wrong - the Germans signed out the study room, so it's theirs fair and square. A war is born, and each group arrives earlier and earlier to try and beat out the other to stake their claim on the study room. But Jeff and his gang lose out every time.
The gang is exhausted but Jeff refuses to admit defeat - he has one last trick up his sleeve. They organize an Oktoberfest celebration in the cafeteria and snap photos of the Germans enjoying their heritage. They take the photo evidence to the Dean, who reprimands them: you aren't allowed to celebrate your own heritage at Greendale! Only the heritages of others. Unfortunately, this means the Germans are banned from a number of school facilities, including the study room. Victory!
Imagine the gang's surprise when they arrive back at their study room to find a full-fledged protest in action. As it turns out, THEY were the ones in the wrong, NOT the Germans. For years, the group has been monopolizing the room, without taking into account the fact that someone else may want to use it. Professor Cornwallis' history lesson has suddenly taken on a new meaning - what if the Greendale Seven are the real villains in this scenario? They do their best to make good, repairing the other study rooms and doing their part to make Greendale a nicer place for everyone.