IT ISN’T UNTIL Marcy Ross goes from being one of the millions of unnoticed high school students to becoming a truly invisible girl that she begins to get the attention she’s been missing. When invisible Marcy starts smacking around Cordelia’s prom date, attacks one of Cordy’s snobby friends, and nearly asphyxiates Cordy’s favorite teacher, a violent pattern seems to be forming around one of Sunnydale’s most visible students. On the day of the prom, Cordelia winds up minutes from having her faced slashed by the invisible girl, but Buffy is able to save Queen C and expose her attacker. The feds, however, have other plans for Marcy.