9.30pm thursday / august 28

Detective Stabler is thrown through a glass window in the opening scene of this dramatic episode as the police struggle to control a crazed convict called Cupid.

The injury rules Stabler out of action for the next few days, so Detective Benson teams up with Detective Tutuola to investigate the contents of an envelope that has made its way to the unit via an unrelated courier.

Inside the envelope, the Detectives find photographs of a young boy, a letter and a memory card. The case immediately looks like the work of a child pornography offender.

When an apartment block is quickly confirmed as the crime scene, the building supervisor Seth Milstead attracts some unwanted attention from the detectives. When more substantial pornographic evidence comes to light, Seth is arrested for possession of child pornography.

For the case to reach a trial, Detective Benson needs the young boy in the photographs, Diego Benitz, to testify with his story. When she gets the chance to talk to Diego, her time is cut short as she begins to develop the same mysterious symptoms that Diego and his mother Jennifer are also experiencing and the investigation takes a turn in a direction no-one expected.