Mulder believes a ghost protects a woman.
A wannabe prom queen crashes her car into a ravine filled with kryptonite, releasing her spirit and affecting the behaviour of others; Lex gives the seniors a special gift by booking the band Lifehouse to perform at the prom.
Clark must stop the school photographer when he sets up a simulated high school and starts kidnapping students to populate it; Genevieve, realising that Lana has the crystal, attacks her to gain control of the stone.
The agents investigate the murder of a city official, a crime that doesn't appear humanly possible. Scully receives a phone call from her brother and thinks deeply about giving her child up for adoption.
Karen comes to Vivian's aid by starting stem cell treatment. Calista channels her inner private detective to spy on her husband, Luca.