As Jake struggles with his first case back at the precinct, he encounters Jess Day, who is visiting New York, and enlists her to help him find his suspect. Meanwhile, Holt researches ways to increase office morale and Amy tries to figure out why Rosa keeps taking such long breaks.

The crossover continues on New Girl S06E04 Homecoming (II).

Pimento and Rosa decide to pick up where they left off and get married, so the whole squad preps a perfect wedding under Amy’s careful direction. Pimento enlists Jake and Gina to hunt for his grandmother’s ruby earrings for Rosa to wear in the ceremony, but the universe has other plans for them.

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.

A visitor from Latvia causes Charles and Jake to investigate Nikolaj's family. Holt and Amy bring in famed forensic scientist Dr. Yee to help close a case for Rosa.

Gina invites Jake and Terry over to her new place. Holt takes an interest in Nikolaj's education. Rosa rejects Amy's offer of a helping hand.

Holt risks his career by refusing to let his greatest nemesis have the last word. Boyle and Terry compete for Jake's tickets to an exclusive kid event.