Cameron, Cash and Melanie discover that Oz is forced to sell the company to a corporate conglomerate headed by the brash and bold Veronica Mann, who along with her prickly British assistant Molly, turns the office upside-down.
When Veronica doesn't approve of Contra's annual contract with a lingerie company to protect an extremely valuable diamond-encrusted bra, the team goes behind her back to pull it off (the mission, not the bra).
As the team searches for a computer hacker, Oz worries when Veronica allows a young teen to become the office's new intern. Meanwhile, Cam and Melanie have an awkward night on a stake-out and Molly becomes "protocol officer".
Cameron gets cornered when Veronica gets jealous of the universal popularity of elusive international sales rep Jones, and commandeers him to undermine that 'rival' for popularity while prodding everyone to revel in her own lavish party, but also threatening with the sack to attend reluctantly, while Oz discloses to Molly Jones's true identity and job. Cash is pushed to stop swooning about lunch girl and finally make a move.
After Veronica's careless office behavior threatens to undermine Oz's authority, Oz retaliates by turning Veronica's assistant (Molly) against her through a series of CIA-level deprogramming steps. However, the plan goes horribly wrong when Molly develops a crush on Oz, forcing him to enlist Cash as his "Cyrano De Nerdgerac" to repel the smitten Molly.
As Veronica (Megan Mullally) moves to take over Contra, Oz (Christian Slater) resists her efforts to transform the company into a bland corporate subsidiary as he tries to retain the loyalty of his staff.
Losing a new account to his former protégé (guest star Samm Levine) forces Oz (Christian Slater) to admit that he's been harboring a costly secret. Meanwhile, Cameron (Bret Harrison) looks to break Cash (Alphonso McAuley) of his online auction habit.
When her visa expires, Molly's (Erin Richards) imminent deportation leads her into a sham marriage with Cameron (Bret Harrison). Meanwhile, Oz (Christian Slater) discovers that he is still married to his ex-wife Amy (guest star Alyssa Milano).
Veronica (Megan Mullally) believes her career is in jeopardy when longtime corporate rival Heather O'Brien (guest star Perrey Reeves) decides to give Contra a makeover. Hoping to woo Heather's lovely assistant, Cameron (Bret Harrison) tries to make his phony green card marriage to Molly (Erin Richards) appear legitimate.
After she's banned from Contra's boys' night out, Veronica (Megan Mullally) rallies the women for their own night on the town. But as Cameron (Bret Harrison) worries about being the subject of the girls' gossip, the disappearance of a prized trophy forces Contra's men and women to join forces to find it.
As Oz (Christian Slater) squares off in a fight to the finish with his longtime nemesis Henry Shaw (guest star Samm Levine), Cameron's (Bret Harrison) marriage to Molly (Erin Richards) is threatened by the unexpected return of his ex-girlfriend and Contra's lock-picking expert, Melanie (Odette Annable).
Molly's uncle, Star Wars star Peter Mayhew, hires the delighted Contra team to retrieve his stolen Chewbacca costume for a fortune. Oz hopes that will enable him to buy the firm back from OCP, but still finds Veronica's help indispensable.