Cynthia Nixon turns in a powerful performance as a woman with multiple personalities who may have abused and fatally harmed her daughter. As Detectives Olivia Benson and Elliot Stabler dig more deeply into the case - with initial resistance from Dr. Henry Carlisle -- Donovan continues to present even more personalities along with a harrowing twist to the case. For the detectives, it's a race against time to find the infant, while adjusting to sweeping changes in the SVU - a result from poor decisions made by the detectives that have spilled over to the squad.

When 15 year-old Shane Mills is diagnosed with a sexually transmitted disease, he claims he caught it from his teacher, Sarah Trent who supposedly seduced him. Sarah argues Shane raped her. Detectives Olivia Benson and Elliot Stabler search further into both Sarah and Shane's lives and uncover some dark secrets.