In the Season 3 premiere, Hannah tries to keep her OCD under control as she focuses on living with Adam and her writing career. Meanwhile, Adam has an unpleasant encounter with Natalia at Ray's new coffee shop; Marnie and Shoshanna attend a dinner party at Hannah and Adam's; and Jessa doesn't make many friends in her new surroundings.
Hannah reunites with Jessa on a road trip with Adam and Shoshanna; Marnie moves into her own apartment.
Hannah turns 25 at a wild party thrown by Marnie and her parents at a local bar, but the festivities are marred by an unexpected visit from Adam's emotionally disturbed sister and Ray's clash with Hannah's editor over the soundtrack.
Hannah deals with a tragedy, but her friends wonder why she seems more concerned with her book. Meanwhile, Jessa tracks down an old friend she thought was dead; and Marnie reacts to a video that Charlie posted online.
Hannah looks for a new publisher in the wake of another social misstep, and tries to broker peace between Adam and Caroline. Meanwhile, Marnie asks Ray for an honest assessment of her personality; and Shoshanna discusses her future plans with Jessa.
Hannah writes advertorials for GQ magazine, but feels stifled in a corporate environment. Meanwhile, Shoshanna wonders if she did the right thing by breaking up with Ray, who has a contentious lunch with Marnie.
Hannah runs into Elijah on a weekend getaway at a Long Island beach house and invites him and his friends over, but she isn't sure how it will affect Marnie's schedule for getting her affairs back in order.
Patti LuPone is interviewed for a GQ advertorial, and warns Hannah about Adam's new career path and some problems it may present. Meanwhile, Jessa gets an unexpected visit at work from an old acquaintance; and Marnie is intrigued by Adam's new friend during a group celebration.
Hannah gets an odd request from her mother when she goes to visit her grandmother in the hospital. Later on the same day she goes out for a drink with her over-achieving med student cousin.
Shoshanna gets too involved in Jessa & Jasper's lives. Hannah tries to reignite the spark with Adam.
Elijah helps Hannah out with an assignment. Marnie's open mic-performance goes ahead. Jesse struggles searching for a job.