Marnie and Desi perform a live duo, while Hannah prepares for her big move to Iowa.

Jessa gives her opinion on Marnie's new song. Shoshanna and Ray go shopping together. Desi gives Marnie news that makes her smile. Hannah writes an apology letter that doesn't go over well. Then she learns of the new things in Adam's life.

Hannah's friends try to help her through a crisis after she arrives back in the city and finds everyone has moved on with their lives while she was in Iowa. Hannah and Adam have an honest conversation about their relationship.

Adam's new girlfriend reveals a surprising revelation that can tear apart their relationship, while Hannah and Ray make big career decisions.

Hannah begins a new job and goes on a date with a co-worker. Mimi-Rose hosts an art show.

Hannah's father makes a shocking announcement. Marnie and Desi take things to another level. Shoshanna tries to get back in the dating game.

Hannah, Adam and Jessa try to convince Caroline and Laird to forgo their planned home birth.