Jen and Mel run "The Breaker Upperers", an agency in Auckland for people who need help breaking up with their significant others. They use unorthodox means to help their clients, such as impersonating police officers to inform a woman, Anna, that her husband has died and that his body has gone missing. During their twenties, the two women befriended each other after discovering that their then-boyfriend, Joe, had been cheating on both of them. Although Mel has moved on, Jen remains obsessed with Joe, who has moved back into town with his wife and children. Mel becomes infatuated with Jordan, a seventeen-year-old client who is afraid to break up with his fearsome girlfriend, Sepa. The attraction is mutual, much to Jen's hesitance. The three meet with Sepa and her gang to break up the couple; Sepa does not take the news well and punches Jen in the face. After the incident, Mel and Jordan begin dating. One day, Jen and Mel re-encounter Anna, who still believes that her husband's body is missing and that the two women are police officers. Anna and Mel soon become friends due to their many shared interests, which annoys Jen and makes her feel left out. Eventually, Anna begs the two women to provide her with access to her husband's file. Jen and Mel, who are dressed as police officers, attempt to continue the charade by taking Anna on a tour through the localpolice station. Their plot is revealed when a real officer mistakes them for being strippers and requests a lap dance. After providing the lap dance, a shocked Anna storms out of the station. Mel apologises and explains that Anna's husband had hired them. Anna does not forgive them; she is furious and states that what the two women are doing is wrong and that many people have been hurt by their actions. Mel takes Anna's words to heart and considers leaving the agency, infuriating Jen, who sees nothing wrong with what they are doing. Their friendship is further complicated when Jen blames Mel for causing her breakup with Joe many years ago. Despite being reminded that Joe had hurt the both of them, Jen cuts Mel from her life. Mel leaves the agency. Jen contacts Joe and they meet up for dinner at a restaurant. She declares her long-time love for him and states that he is "the one". Initially believing that she is joking, Joe laughs at her. He reveals that he had cheated on her with not only Mel, but with several other women as well. Joe rebuffs Jen by stating that although he was unfaithful in his youth, he has since grown up. Meanwhile, Mel continues to date Jordan. Although he is a kind and caring person, she realises that due to his youth, Jordan remains naive and childish. He is also still in love with Sepa, who had been supportive of his budding rugby career. When Jen runs into Mel at the shops, the latter reveals that she is pregnant. She wishes to keep the baby, but is unsure of her relationship with Jordan. Jen enlists the help of Sepa, who is still in love with Jordan. At the local pub, Jordan is being publicly congratulated on his recent contract to play rugby with the Gold Coast Titans. Mel is also in attendance, and she appears worried when Jordan states that he is willing to forfeit the contract to stay with her and the baby. Sepa and her gang arrive at the pub with Jen. Sepa grabs the microphone and declares her love for Jordan, apologising for her confrontational personality and stating that she knows she needs to soften her behaviour. Sepa and her gang sing for Jordan, while Jen sings to Mel about their friendship. Mel then gently breaks up with Jordan, encouraging him to go back to Sepa and accept the rugby contract. She also assures him that she and their baby will come and visit him as often as possible. Satisfied with her support, Jordan reunites with Sepa. Jen and Mel make amends, with Jen promising to be there for her friend and support her through motherhood. In the end credits, Jen and Mel have since rebranded their agency to help clients with "make-ups and break-ups". They are seen reuniting couples, including those who had previously used the agency for break-ups. Anna has forgiven Mel and the two resume their friendship. Jordan has moved to the Gold Coast and is seen happily playing with his infant daughter.
The film received positive reviews. It holds a 89% on Rotten Tomatoes based on 45 critic reviews, with the consensus that the movie "brings the laughs early and often, thanks to the dry wit — and effervescent chemistry — of writer-director-star duo Jackie van Beek and Madeleine Sami". On Metacritic, the film holds a 76 based on seven reviews, indicating "generally favourable reviews". The film grossed over 1.7 million dollars at the New Zealand box office, becoming the best-selling New Zealand film of 2018, and is one of the top 20 grossing New Zealand films ever.
