Inspired by the "Karate Kid" films, Adam and the other Adam Goldberg face off in a karate match to settle once and for all a long-running feud. Barry and Adam go to Uncle Marvin for training, but the only thing they learn is how to clean an apartment. Meanwhile, when Erica and Geoff's relationship becomes public, they realize that they aren't the good guys.

Adam questions his career path of filmmaking when "the other Adam" moves back from Los Angeles and warns him making it big in Hollywood isn't easy. Meanwhile, the JTP house is in shambles, and Geoff becomes the home manager as they know how much he loves to please and can't say no.

When Erica and Geoff plan a joint bachelor/bachelorette party at the beach, Barry finds himself face-to-face with his ex-girlfriends and their current boyfriends - causing him to spiral in his attempt to stand out during the festivities. Meanwhile, Adam decides to intervene when Lou takes over planning the wedding video, ultimately bringing the families together.