Holt is taken by surprise when his longtime nemesis, Deputy Chief Madeline Wuntch (guest star Sedgwick) arrives for an inspection of his precinct. Meanwhile, Jake and Terry test the boundaries of “work friends” vs. “friend friends” as they investigate a stabbing at a hipster chocolate milk bar.
Charles enlists Jake's help in tracking down his son's favorite toy for Christmas, and the two find themselves accidentally facing off against a Latvian criminal ring as a result. Back at the precinct, the team gears up for their annual Christmas carol competition against their sworn enemy: the MTA...
Gabrielle tries to keep Grace in her life; Renee shares a dark secret with Susan; Paul's plan is revealed.
Fiona attempts to out the new Supreme with a visit from Stevie Nicks. Cordelia learns the truth about Hank and the Witch Hunters. Madison tries to eliminate her competition for the Supremacy.
When assigned to forgive others, Maya writes to her father to try to forgive him for leaving as Riley tries to forgive Auggie for destroying something precious to her.