When wedding day jitters explode into chaos for Alex and Dave, they and their circle of friends are left wondering if their tight knit group can survive the ensuing break up.

As Alex (Elisha Cuthbert) and Dave (Zachary Knighton) struggle to move past their wedding day breakup with the support of their family and friends, Jane (Eliza Coupe) fears that her marriage to Brad (Damon Wayans, Jr.) is in danger of losing its spark. And as Dave reluctantly moves in with Max (Adam Pally), Penny grudgingly agrees to attend a cooking class with Alex.

When their favorite band is coming to Chicago, Dave (Zachary Knighton) and Alex (Elisha Cuthbert) refuse to let their recent break up stand in the way of everyone seeing them together. While Penny (Casey Wilson) is excited about reuniting with Tommy (guest star Nick Thune), a Barefoot Pedaler fiddler with whom she had a one-night stand, a YouTube video of the wedding day debacle reopens Dave’s emotional wounds.

Dave (Zachary Knighton) decides to quit his job and open a restaurant, only to learn that his friends think he is making a big mistake. Meanwhile, as Jane (Eliza Coupe) and Max (Adam Pally) vie over which of them would survive a zombie apocalypse, Penny (Casey Wilson) struggles to fit in with her new hipster boyfriend (guest star John Bobek) and his friends.

As Dave finds himself sucked into a serious relationship with a woman he doesn’t like, Alex searches for a roommate and Penny finds a flamboyant friend.

Alex and Jane's sibling rivalry heats up; Dave dates an attractive woman (Bre Blair) with an unusual quirk; Penny gets an assistant.