Elaine's friend Leslie, a former performance artist, is pregnant after marrying a distant cousin of the Kennedy family by marriage. This news dredges up George's old grudge over a date with Leslie, where she ruined his new shirt with a chocolate syrup spill while staging a performance in a Brooklyn warehouse, then snubbed him and never apologized. Worse, when he confronted her, all his grievances came out as bootlicking instead. Out of a need for Leslie's approval, Elaine agrees to host her baby shower. With Elaine's roommate down with both Lyme disease and Epstein–Barr virus infection at the same time, Elaine asks to use Jerry's apartment while he is performing in Buffalo. George seethes all the while in shame.
Due to a carriage dispute, Jerry has no cable TV and is reduced to searching for signals with his TV antenna. Kramer is paying two Russians (Vic Polizos and James Lashly) $150 to hook up pirated cable for him, and pressures Jerry to join in. The Russians offer to do the work while Jerry is out, and Jerry, despite his paranoia, relents to Kramer's reminder of Mets games on cable.
Jerry has a nightmare that the Russians were undercover FBI agents who set him up in a sting, and he is gunned down trying to flee his apartment. He wakes up to find his flight diverted by a blizzard that has also canceled his show in Buffalo.
George is overeager to pick up Jerry at the airport, and Jerry, realizing he is wearing the ruined shirt, sees through his ulterior motive to crash the baby shower and confront Leslie. At Jerry's place, Leslie brushes off Elaine currying favor with the Kennedys, and complains about the catering. Kramer brings the Russians without warning, and twists Elaine's arm to let them work through the party. The Russians help themselves to the food, fight each other, and commandeer the bathroom from the guests.
George rehearses an explosive speech releasing all his pent-up rage at Leslie. This comes to nothing when he approaches her and immediately becomes a timid bootlicker again. At the same time, another guest, Mary, confronts Jerry with her pent-up rage over being snubbed by him after a date three years ago, just as explosively as George planned. On her way out, Mary shoves Leslie's cake into George's shirt, doubly soiling it.
The guests leave; Elaine, left with Leslie's assessment that she has not changed since college, does not know whether to be offended. George obsequiously hauls all of Leslie's gifts for her.
Jerry backs out of the cable piracy and offers to pay for the work. He balks when the Russians demand $400, so they smash his TV. George, Elaine, and Jerry dejectedly mope in front of the broken, staticky screen despite Kramer's invitation to watch his pirated cable.