Doing a favor for CIA Director Suri Nance (Laila Robins) goes awry for McCall when she tries to locate a missing British mathematician and finds herself embroiled in an international fight for a revolutionary financial technology.
A corrections officer (Garrett) is arrested for sexually assaulting female inmates in and out of prison, and the union that supports him targets Barba (Raúl Esparza) and the SVU.
With the help of the memory of her late mother and some long forgotten advice, Sydney rediscovers her love of Christmas for the first time after her mother passed away.
