Two men ride bicycles in Kansas City. They are making religious calls. They call on a woman who says she is just moving in and brushes them off. Outside her house is a red car with the license plate "Betty." At another house, a few blocks away, they call on another woman who has a car with the license plate "Lulu," and who looks just like Betty. She closes the door on them and the two men begin to fight, which they continue until police arrive.
One day later, Mulder and Scully call on Betty Tempelton - they are investigating a possible hate crime. But they are not Mulder and Scully - just look-alike FBI agents. As they talk, Lulu drives by and the two agents begin fighting. The real Mulder and Scully talk about the case -- it is as if they temporarily lost control of their minds. Scully bristles at the game of Mulder dropping clues but holding things back. She keeps guessing, throwing out wild ideas that could have come from Mulder, eventually hitting on the "right" solution. In downtown Kansas City, Lulu Pfeiffer enters a Koko`s Copy store, where she has applied for a sales job. She has had 17 jobs in 17 states in 3 years, which raises a red flag. While she is there, the copy machines begin malfunctioning. Betty has applied for a similar job at a Koko`s Copy and her resume lists a similar number of jobs.
In a hotel, a man, Burt, is packing money into a small suitcase. M&S arrive at his door, looking for Betty Templeton. They have a newspaper clipping of him with Betty in last year`s Fourth of July parade. He denies knowing Betty, but mentions an address where he thinks she lived. At Fogy`s bar, Burt meets Betty and is surprised that she doesn`t seem to know him. Lulu also arrives - she is the one who is Burt`s girlfriend. The bar begins to shake when they see each other, with glasses and bottles exploding.
At Pat Devine`s Kansas City Auditorium, Scully arrives to find Mulder sitting with an older man who we learn is a fight promoter and Burt is a wrestler. Scully tells about Lulu and the path of destruction that has followed her. The two women have trailed each other for the past twelve years with things like fights, house fires, explosions, and riots everywhere they go. When the agents leave, the promoter calls Burt asking for his money. Betty is in bed with him. She goes into the bathroom to dress and Lulu comes to the door, asking where Burt was last night and if he is two-timing her. He calms her down and eases her out the door but Betty comes out of the bathroom. Suddenly shots pierce the ceiling from above. Burt goes to a bar to deliver money to the promoter but both Betty and Lulu walk in and another series of explosions racks the bar. Flying glass knocks out Burt and the promoter walks off with his suitcase of money. When he wakes up, Mulder and Scully are there. Scully says Betty and Lulu caused this and they`ll do it again of we don`t find them. Mulder tracks down Betty at her copy shop job and she says it`s Lulu`s fault. She follows her around but "it`s her or me this time. I don`t want to leave Kansas." Scully has just talked with Lulu, who also works in a copy shop and says the same thing about Betty. There is some kind of a psychic connection between them. Outside Betty`s work place, Lulu drives up and in the mayhem, Mulder is sucked into an open manhole.
Scully drives up and enters Koko`s Copy, looking for Mulder. Scully uses the copy shop Internet access, then goes to the Kansas State Penitentiary to talk to Mr. Damphus. He appears to be the father of Betty and Lulu, via a sperm bank. She wants to collect information about his family tree. He is angry and insulting. Betty goes to Burt`s - he has one more shot at the big time, but his money disappeared when he was unconscious. She says maybe she can help, and leaves. A moment later, Lulu
comes to his door and they hold the same conversation. Betty breaks into
the copy shop and makes color copies of money. Lulu does the same thing at her shop. Mulder finally manages to get the manhole cover off and escape the storm drain. Scully is still at the penitentiary when Mulder calls her. Scully says the father is the angriest man in the world. Mulder explains that both Betty and Lulu love Burt and don`t want to leave. The agents agree that they have to get to the fight and keep the two women apart, but Scully notices that there`s is a man who looks just like Burt is in a cell at the penitentiary.
Burt is at the auditorium in a WWF-type wrestling costume, complete with cape. He is known as "The Titanic." One of the women delivers the money, which Burt uses to pay for the fight, and the fight begins. Mulder approaches Betty in the audience when Lulu walks up. Mulder tries to drag Betty off, but the entire audience begins fighting. Scully arrives with the other Burt. The two women are astounded, and the fighting stops. Scully grins but when the two Burts see each other, the fighting resumes. The fighting fades out, and we hear an explanation by Scully - there have been millions of donations to sperm banks and maybe nature has just so many creations. The odds of meeting your double are incalculable, but neither Burt and his sibling nor Betty and Lulu could avoid their two compulsive mannerisms. When two original copies meet the results are unpredictable. We see that both Mulder and Scully have extensive wounds and stitches from the fight at the arena.
