A behind-the-scenes documentary about the filming of Medellín in Bogota, Colombia. Billy and Eric clash on the set about keeping the film on track. Billy becomes attracted to an actress which ends up disrupting the production. Drama tries to get Billy to give him a part in the film.

With the gang arriving back in America, Drama plans a party for Vince at his new condo. Ari learns that his son might not be accepted to an exclusive private school. Billy's insecurities may prevent Vince and Eric from seeing the first cut of Medellín.

Billy submits Medellin to the Cannes film festival, leading Eric - who thinks the film needs work - to worry that it will get rejected. Drama rekindles an old flame, and brings Turtle in as his wingman. Vince gets in over his head in Malibu.

Ari mistakenly mishandles a top-secret script, a mistake that lands him in jail. Drama fetes the mayor of Beverly Hills, with help from Vince. Eric has to go back on his word with Harvey Weingard, a Hollywood heavyweight, when Medellín is accepted into the Cannes Film Festival.

The Medellin trailer is leaked on YouTube and Billy blames Eric. Drama joins an exclusive medical marijuana club. And Ari and Lloyd engage in sabotage so that Vince can get his next project.

Billy makes amends with Eric over the online leak of Medellin. Lloyd takes a leave of absence from the Miller Gold Agency for personal problems. In the meantime Turtle makes an investment.

Eric and Turtle's love lives become a source of amusement for Vince and Drama. Ari adjusts to having his son in public school.

When Eric gets his own office, Vince eyes a piece of antique furniture that also has a rich history, but someone has already gotten his hands on it. Ari preps for a meeting with R&B superstar Mary J. Blige, but has to contend with twin-sibling rivalry in his own office.

Eric gets into a fender-bender with Anna Faris, leading to what he believes to be "a little moment," but in the end, his career is about to change. Ari's wife acts on a soap opera, leading him to try and dissuade her from doing so. Turtle gets prepped for a party by picking up some provisions, and girls, only to encounter the law on the way home.

A security threat at LAX strains everyone's hopes of getting to Cannes in time for the Medellin premiere. Mrs. Ari and Lloyd both wish to take the trip with Ari to Cannes. Walsh writes Eric's new client into his script. Help in the end comes from a very unexpected source.

In the fourth-season finale, attempts to sell “Medellin” at Cannes are complicated by the fact that no one has seen the finished product. Meanwhile, the popularity of “Viking Quest” gives Drama a boost.