Mary is assigned to protect a witness named Judy Wagrowski, whose extraordinary mathematical abilities allowed her to keep all the financial records of a numbers racket in her head. That skill, however, is the result of her Asperger's Syndrome, which also makes it difficult for her to understand figures of speech or to keep the secrets necessary to remain a protected witness. Judy also has trouble breaking her ties with Larry Silvers, one of the suspects she will testify against, whom she regards as her only friend. At the same time, Marshall and Stan try to help a nurse secure the green card she was promised as part of her agreement to testify - meeting with puzzling resistance on the part of the INS.
—aldanoli