A young girl is found dead with a doll left as a totem. With Dr. Huang out of town, Detectives Benson and Stabler ask a psychiatrist from one of their previous cases (Jeremy Irons) for help. Jackson joins the detectives as they retrace the girl's last steps and go to meet with her piano teacher (Elizabeth Mitchell). During the questioning, his skills prove invaluable in deciphering the meaning of the totem and ultimately finding the killer. Jackson and the detectives learn that the piano teacher was lying to protect her sister (Agatha Nowicki) and that both women suffered from abuse at the hands of their mother (Lisa Banes).