Gillian and Ashley have sent out their wedding invitations and Cam didn’t get one. Instead of asking them if his invite got lost in the mail, he follows Ally into work and drinks. Luckily, it’s the Road to El Dorado bar crawl, so there are plenty of bros dressed up as cartoonish Spaniards to drink with.

Samuel’s turning 30 and he doesn’t want to do anything about it. Ally cannot stand that, so she pushes Samuel to have the biggest and best birthday ever. Cam realizes that male friendships are weird so he doesn’t know what to get Samuel for his birthday, so he reaches out to his work-wife Lydia for advice.

Samuel has finally pushed himself into following his dream of writing for a TV show… but that doesn’t mean he can’t procrastinate to an unholy degree. On his way to a coffee shop to write, he’s distracted by the magnetic and devious Nessie MacLean, the CEO of a startup that turns trains into co-working spaces. Cam and Ally have to save Samuel, but does really he need to be saved? Yes, yes he does.

Samuel’s mom is coming to visit and he’s a nervous wreck. Samuel tries to get his mom on the phone as she’s led through the city by famous actor David Boreanaz. Ally cannot control herself because she is a massive Boreanazite... and she happens to be waiting for a terrible package company to deliver a life-size pillow of his torso.

Grumbling to himself on the train, Cam tears into the videos of streaming giant Bradisgoodatsoccer… and Bradisgoodatsoccer is there to hear him with open ears. Back at home, Samuel Clemens is adjusting to his life living with his new roommates, including respecting Ally’s nocturnal bartending sleep schedule.

Now that Cam and Ally have secured recent city transplant and sweet weirdo Samuel Clemens as their roommate, they can get back to doing what they do best: making fools of themselves. Ally flirts with a train conductor who makes overly familiar PA announcements, and Cam bonds with a woman on the train about how much they hate those overly familiar train PA announcements.

Roommates Cam Chabon and Ally Lonergan are surprised when their longtime friend and roommate Gillian proposes to her girlfriend Ashley at their newly opened subway station. When Gillian announces she’s moving out, Cam and Ally must find someone to replace her as soon as possible.