A security detail is assigned to Benson after Lewis escapes prison, leaving a trail of murders. However, it doesn't take him long to get to her and Olivia is faced with a life-threatening dilemma.
Amaro suspects the boyfriend of a missing girl is involved with a gang, and Sergeant Benson becomes the SVU's new commanding officer.
Dr Choi is affected by the outcome of gang violence; Dr Halstead is encouraged by a patient's cheery disposition; Dr Manning and Rhodes think that two cases of illness could be connected.
The new neurosurgery centre opens and Nic is forced to work alongside Cain again; a heart transplant has an unexpected result; Bell asks Conrad to re-examine three patients who may have been poisoned.
A renowned paediatric cardiac surgeon proves unfit for surgery; a Dolly Parton drag queen collapses on stage; Nic and Conrad suspect a patient may be the victim of sex trafficking; Nadine delivers some surprising news to Devon.