Jess invites her divorced Mom and Dad over for Thanksgiving dinner and enlists Nick and Cece to help her with a "Parent Trap" to reunite them. Meanwhile, Schmidt's cousin, Big Schmidt, visits, and Winston manipulates them into an escalating battle to prove their manhood.

When Cece and Schmidt ask Jess and Nick to be their Maid of Honor and Best Man, respectively, their first task is to plan the engagement party. But when Jess invites Cece's mom to join in the celebration, Cece is forced to make a surprising announcement to Schmidt.

After being emasculated in front of Cece, Schmidt insists on a manly bachelor party weekend in Vegas, but the road trip goes awry when the guys end up at a desert biker bar and he must put his newfound bravado to the test.