When a popular fighter doesn't show up for the biggest bout of the year, Rollins and Velasco are drawn into a complicated web of secrets; McGrath confides in Benson.
Holiday celebrations are interrupted when Detective Tutuola's ex-brother-in-law is arrested for attacking a priest. During the investigation, a church scandal is uncovered.
Ruzek and Atwater go undercover as prison inmates in a bid to find the man they suspect killed a 10-year-old girl. Meanwhile, Burgess and Roman offer a tour of the district.
The detectives are on the scene of a transvestite's murder. They know the victim's friend Monika from a case from the previous year.