FBI agent Star Morrison (guest star Marcia Gay Harden) reappears on the scene, where alleged rape victim Haley (guest star Kristen Bush) refuses a rape kit. Benson learns that Haley is an FBI informant whose ex-boyfriend is a radical environmental rights advocate. In order to foil the group's terrorist activities, Benson goes undercover to further investigate.
A photograph of a dead boy found in an anonymously delivered envelope leads Dets. Fin (Ice-T) and Munch (Richard Belzer) to the apartment building that houses the crime scene. The investigation reveals the building supervisor has spent a lot of time with the boy in the picture, and he falls under suspicion. The case takes a physical toll on Det. Olivia Benson (Mariska Hargitay), the victim (guest star Marquis Rodriguez), and the boy's mother (guest star Karen Olivio) as they all start to have similar medical issues. Their symptoms appear to point to the same origin, which unearths a corporate conspiracy and cover-up.