Harry and Co are adults and the war is over, one night they go out drinking but it's different tonight cause Hermione (normally the responsible one) is in an angry huff and wants to be as drunk as possible as quickly as possible. Things rapidly go down hill, and the gang wake up the next morning havimg gone through a wide variety of very stubborn transfigurations that leave them with a mismatched jumble of anatomy. That's just the start of things as they get news that their drunken revelry has caused a lot of chaos, and so they have to piece together just what it was they did last night, as well as how to undo whatever it was that happened to them