A woman claims that Brian Cassidy raped her while he was working under cover; when Cassidy and his lawyer utilize surprising defense methods, Detective Amaro is affected.

The SVU detectives investigate after a school nurse notices multiple injuries on a young girl; Detective Amaro tries to bond with his recently discovered son.

The detectives uncover a shocking theory as they work to learn the identity of a man Rollins arrested for exposing himself in the park.

A measles outbreak delays arrests in a case involving pornographic photos taken by teens at a party. Meanwhile, Benson discovers that some kids' medical records may have been falsified after Noah gets measles; Amaro leans upsetting news about his son.