While training for a marathon, Jess discovers that Cece has been keeping a secret from her, and their friendship is put to the test. Meanwhile, Winston can't handle being the only one who knows about Cece and Schmidt, and Nick reluctantly asks for Schmidt's help as he tries to juggle dating two women at once.

Jess fears she and Russell don't share the fiery passion he exhibits with his ex-wife Ouli. Meanwhile, Cece is not yet willing to admit her true feelings for Schmidt, so she encourages him to go on a date with one of her Russian model roommates. Then, a down-in-the-dumps Nick channels all of his energy into a new vegetable garden.

After spending a wild night out with Cece and her model friends, Jess jumps in the driver's seat when she must fill in for Cece at a car show. Meanwhile, the guys question what defines male friendship after Schmidt buys Nick a cookie.

Jess decides to throw Cece a surprise bachelorette party while Nick and Winston awkwardly take her fiancé, Shivrang, out for the night. Then, as Schmidt desperately tries to find a real girlfriend in time for the wedding in order to get a “plus one,” he is forced to seek out his old girlfriend from his “fat Schmidt” college days.

Schmidt quickly regrets trying to understand the politics of a girl fight when one breaks out between Jess and Cece. Meanwhile, Nick goes on a date with Tran's granddaughter, whom Winston believes is hiding a secret.

It's time for Cece to move into the loft. While Jess is helping her friend move out of her beloved apartment, she has to finish the school's budget by morning, which the new principal has neglected to tell her. Meanwhile, Winston gets a new partner to avoid having to work side-by-side with Aly.

Refusing to accept that their crazy days are behind them, Jess and Cece abandon their low-key bachelorette party plans and seek a night out to top all others.

Schmidt makes a last ditch effort to convince Cece's mom to come to their wedding, but in doing so, he might miss the special day himself.

When Schmidt and Cece and Winston and Aly invite Jess on their couples glamping trip, members of her singles-only group tag along. Meanwhile, Nick struggles with the next chapter of his New Orleans-set novel after Schmidt gives him "no notes".

Jess and Nick make two life-changing decisions and Winston and Aly's big day arrives.