Hannah receives the results of her STD tests: she has contracted HPV. After an accusatory conversation with Adam about him being the one who infected her, Hannah then comes to the conclusion that Elijah Krantz, her boyfriend in her last two years of college, is the one who infected her. After a discussion with Shoshanna about the issue, Hannah decides to confront Elijah, although she also decides to use that opportunity to reconnect with Elijah sexually, despite the issues which led to their breakup. Hannah learns much more during her meeting with Elijah, that new information which changes the focus of their discussion. Meanwhile, Marnie is feeling more disconnected from Charlie, especially following what she considers a selfish act by Charlie but one which he did for humanistic reasons. She in turn starts to fall for artist Booth Jonathan primarily because he's everything that Charlie is not. And Jessa starts work as a babysitter for the Lavoyt family. She treats the job in a laissez-faire attitude like she treats everything else in life.

Hannah gets a new freelance gig, and her editor suggests that she should try cocaine for the first time to write about her experience. In the process, she gets to know her downstairs neighbor, Laird. Meanwhile, Marnie meets her old artist flame, Booth Jonathan, who takes her home to show her his studio.

Hannah is hired to write an e-book, but has trouble finding inspiration. Booth asks Marnie to host a party with him for a gallery opening. Ray goes to see Adam, and they end up traveling to Staten Island to return a stolen dog.