The BAU is called to Taos, New Mexico, to investigate an UnSub who targets the temporal lobes of his victims.
Nick and Hank investigate a drowning death where the victim has mysterious marks on their ankles. Meanwhile, Rosalee is unpacking and Captain Renard makes a realisation about the possible identities of the Royal Baby's parents.
After a married couple discover their newborn is deaf, they elect to try a surgical procedure, but when their surrogate, who also happens to be deaf, learns the news, she feels she has no choice but to intervene.