After Frankie tries to get a stubborn Mike to go see Dr. Goodwin to take care of his toothache, Mike convinces the good doctor to leave his tooth alone and tell Frankie that everything was ok. But the two find themselves fabricating a story that's so ludicrous that they fear Frankie will figure out the truth. Meanwhile, since they are nearing the end of their senior year at college, Axl, Hutch and Kenny decide it's time to sell the fabled Winnebago; Sue tries her best to let college golf cart driver Tyler know that she likes him; and Brick attempts to write a historic Scottish rap musical - a la "Hamilton" - focusing on the life of Sergeant Charles Stuart MacKenzie.

After Axl runs into just about all of his ex-girlfriends while attending a St. Patrick's Day party - including Devin Levin, Cassidy and even Weird Ashley - Hutch tells Axl that the universe is trying to tell him something about his love life, and that he must speak with each of them to try and figure it out. Meanwhile, Brick discovers that Frankie and Mike aren't half as thrilled as he is when he buys an old microfiche machine at a library sale; and not knowing that Tyler is set to take Sue to the Chancellor's Ball, Sean Donahue pays her a surprise visit and offers to escort her to it.