-Jess's troubled older sister, Abby (Linda Cardellini), has been arrested near San Diego.
-Jess's mother (Jamie Lee Curtis) asks Jess to bail Abby out, and put her on a plane back home to Oregon.
-Jess, reluctant to have Nick meet her sister, makes up an elaborate lie about Abby's flight and why Abby can't meet Nick.
-Jess picks Abby up from jail and brings her to the loft, where they briefly get along well--until Abby discovers a text message written by Jess about how ashamed she is of Abby.
-Abby runs off, and Jess collects her at a hotel bar.
-Nick attends a bar mitzvah as Schmidt's wingman, because Schmidt is pursuing the rabbi's daughter.
-Nick begins to believe that Jess is lying about Abby's flight because she is too ashamed of him to have him meet her sister.
-Jess drops Abby off at the airport, but has a last-second change of heart, and allows her to temporarily move into the loft.
-When Nick arrives home, Jess tells him the truth, and introduces him to Abby.
-When they are accidentally stuck on a double date with Winston and his girlfriend, Coach and Cece believe they might still have some sexual chemistry.
-However, they are unable to re-capture the passion that they felt when they made out in the past, and decide to just remain friends.