Lili is moving. What no one knows is that she's moved to the neighboring apartment of her ex-husband, Reginaldo. In his own apartment, Reginaldo talks to his brother, Reinaldo, saying he thinks Lili is up to something.
Lili keeps watch on Reginaldo, who hasn't left his house for three days, convinced that he's hiding something. Reinaldo asks to stay in Reginaldo's apartment for a while, as he's trying to avoid Mari, a teacher he spent the night with.
Reginaldo is dating Mari, and Lili discovers that she's fake, two-faced, a real viper. Lili tries to show Reginaldo the real Mari, but he doesn't want to believe her.
Lili tells Reginaldo that she's dating someone. Reginaldo bets that she's making it up. Lili accepts the bet and starts hunting for a boyfriend on Facebook and dating sites.
Lili dates Valterino and takes the opportunity to taunt Reginaldo by posting pictures of their happy couple on social media. Reginaldo dates Carol, a Drink intern, and returns the teasing in kind.
She, Gina, and Anselmo help Lili detox from Reginaldo. Reginaldo comes home high after drinking a strange cocktail at a party. He starts rummaging through Lili's boxes and becomes nostalgic.
Lili accidentally knocks down the wall separating her apartment from her ex's. Reginaldo calls the police, but Lili promises to rebuild the wall. While waiting for the repairman, she invades Reginaldo's space.
Sergei, the Russian man for whom Lili left Reginaldo arrives at Lili's apartment, saying he needs a place to stay. Lili asks Reginaldo to host him in his apartment. Reginaldo is furious and threatens to beat up the Russian if he sees him.
Lili discovers that Reginaldo unfriended her on Facebook. Reinaldo and Cintia have sex. Reinaldo suggests to Reginaldo that he should have Lili sign an extensive "Anti-Relationship Contract," which Reginaldo presents to his ex.
Lili steps out of the elevator humming a Pixinguinha song and hears the same song playing in Reginaldo's apartment. Lili rings the doorbell and declares: the record is hers.
Lili's light bulb burns out. She asks Reginaldo to change it, but Grace Kelly forbids him from helping. Grace says she'll do it herself - but Lili doesn't let her into her apartment.
Lili returns from a trip with Fred, her new boyfriend, and takes the opportunity to finally let go of Reginaldo. Reginaldo is bothered by this but is forced to accept that the only way to get rid of Lili is to marry Grace Kelly.
Lili and Cintia come face to face with a police officer holding Grace's wedding dress. Reginaldo receives the dress and asks if Lili will attend the wedding. She says she's going to the movies - not realizing it's Reginaldo's wedding day.