Hannah is left floundering when her parents suddenly cut her off. As she tries to figure out what to do, a welcoming party for one of her friends ends up with unexpected revelations.
As Jessa grapples with the decision to abort her baby, Hannah and Marnie are inspired to confront the issues in their own sex lives with their respective lovers.
As Hannah receives shocking news about her health, she is forced into a confrontation with both her current and former lovers. Jessa's new job brings with it an unexpected connection.
Hannah runs into an unexpected hurdle at her new job. Charlie and his bandmate cause problems between Marnie and Hannah as they reveal the contents of the latter's diary.
Marnie comes to a realization about her relationship with Charlie. Hannah makes a dangerous gamble as she tries to put an end to her boss's sexual harassment.
As Hannah reconnects with a face from her past, she comes to examine her choices and the path that has led to where she is now.
At a party, a confrontation between Hannah and Adam leads to the reveal of some secrets. Jessa's situation with Jeff gets complicated after she causes him to get into a fight.
As Hannah tries to turn her life around and turn over a new leaf with Adam, Marnie and Jessa make a connection at a bar.
When she gets the chance to showcase her writing in a writing circle, Hannah ends up sabotaging herself. Marnie confronts Hannah about how much she has been covering for her.
With Hannah now living alone, Adam has a proposal for her. Marnie decides to be spontaneous. A surprise wedding turns everything around for the four girls.