In health class, the students are assigned to take care of fake babies. Vice-Principal Clemmons (Duane Daniels) calls Veronica into his office and gives her detention for having keys to his file cabinet. Beaver walks up to Mac (
Tina Majorino) and asks to hire her to register a company named Phoenix Land Trust and build the company a website. For Veronica's detention, she has to alphabetize and organize old student files. Veronica finds her mother's permanent file and reads that she was frequently in trouble in high school, including being suspended for spreading rumors. While Weevil (
Francis Capra) is in the auto shop he is ambushed by Logan (
Jason Dohring) and his cronies. Veronica talks to Deborah Hauser, a teacher who was in the same class as Lianne. Mrs. Hauser confirms they were suspended, and that she regrets spreading Lianne's gossip. Weevil gets duct-taped to the flagpole. Veronica asks Vice Principal Clemmons about who else might have known her mom in high school, and he tells her to talk to Principal Moorehead and Mary Mooney. Veronica approaches Mary while she is cleaning up lunch trays, but Mary doesn't respond. A student tells Veronica Mary is
deaf. Veronica uses
fingerspelling to ask about her mom, who Mary calls a "fiend". Veronica then talks to Principal Moorhead, who tells her that her mom was "vicious". It is announced that Trina Echolls (
Alyson Hannigan) is coming back to direct a play at Neptune High. Kendall tries to seduce Duncan (
Teddy Dunn) again. Trina meets Kendall, and the interaction is rife with sarcasm. Veronica looks through her mom's yearbook and eventually tracks down Patty Wilson, one of her mother's old friends. Patty provides more information on the love triangle between Celeste (
Lisa Thornhill), Jake (
Kyle Secor), and Lianne. Veronica asks Keith (
Enrico Colantoni) about Lianne's suspension, which she thinks was punishment for spreading a rumor that Celeste was pregnant. Keith says that he doesn't know anything about it, but agrees to look up birth records for 1980. Trina slips and falls during a play rehearsal, knocking herself out. Beaver meets with Kendall and confronts her about selling his father's possessions for little money. Beaver gives her his plan, which involves her being the face of the Phoenix Land Trust, as Beaver is under 18. Keith search of the birth records finds that no baby was born to either "Kane" or "Carnathan" (Celeste's maiden name) at that time. However, he finds that a baby was abandoned in the girls' bathroom at the 1980 Neptune High prom. Veronica bad-mouths Celeste in Duncan's suite only for Celeste to walk in, having overheard everything. Veronica learns that Duncan never told his parents about their relationship. Celeste insults Veronica's mother, and Veronica deduces that Celeste's cleaning lady, Astrid, is probably her daughter. Weevil confronts Logan and they argue before Weevil admits that he no longer thinks Logan killed Felix. However, they agree to start fighting in order to keep up appearances when the bell rings. Mac shows her work to Beaver, and they flirt. Veronica, under a disguise, meets with the prom baby's temporary foster mom. Veronica learns that the baby's adopted mother died by suicide and her adopted father is in jail, hinting that the baby is Trina Echolls. Veronica visits Trina in the hospital and they plot to smoke out Trina's birth mother by telling the tabloids Trina needs a bone marrow transplant. During play rehearsal, Mary Mooney approaches Trina and using
sign language explains that she is Trina's mother. Mary explains to Veronica that Lianne was a friend (not a fiend) and that Lianne helped her cover up her pregnancy. It is revealed Trina's father is Principal Moorehead, and Trina confronts him about leaving her at the prom in front of many faculty. Veronica finds
the dead rat that Keith picked up at the bus. Veronica deduces that Vice Principal Clemmons deliberately gave Veronica her detention task so that she would find her mother's permanent file and expose Principal Moorehead, leaving Clemmons to be promoted to Principal. Veronica picks up Abel Koontz's (
Christian Clemenson) belongings and walks into Meg's (
Alona Tal) room where she discovers that Meg is pregnant. After Veronica leaves the room Meg is shown opening her eyes. == Production ==