Jess babysits Russell's pre-teen daughter for the weekend and meets his ex-wife. Then, Schmidt and Cece panic when they think she's pregnant. Also, Nick's new girlfriend may be too young and Winston discovers his new boss is a big baby.
Jessica Day is an offbeat and adorable girl in her late 20s who, after a bad breakup, moves in with three single guys. Goofy, positive, vulnerable and honest to a fault, Jess has faith in people, even when she shouldn't. Although she's dorky and awkward, she's comfortable in her own skin. More prone to friendships with women, she's not used to hanging with the boys--especially at home.
The gang takes a tour down memory lane, which includes a final round of "True American".
Jess and Nick make two life-changing decisions and Winston and Aly's big day arrives.
Nick's plan to propose to Jess is thrown off-course when they decide to get a dog, Winston sees color for the first time and Schmidt worries about Cece getting pregnant again.
Jess tries to appease Winston's anxiety about his impending fatherhood by tracking down his long lost dad. Meanwhile, Schmidt goes back to work for the first time since Ruth's birth.
The gang gathers for a one-year memorial service for a beloved friend. Meanwhile, Jess discovers Coach owes Nick a large sum of money.