Zack and Miri are roommates who have known each other since childhood. They live in a small apartment and struggle to make ends meet, with bills piling up and seemingly no way out of their financial troubles. One day, while discussing their problems, they come up with the idea of making an adult film to earn quick cash.
Initially hesitant, they eventually decide to go ahead with the plan. They recruit a group of misfit amateur actors, including their high school friend Delaney and a coffee shop employee named Lester, as well as a professional adult film star, Bubbles, to help them with the production.
As they begin filming, Zack and Miri find themselves growing closer to each other, leading to a series of romantic and intimate moments. However, their newfound feelings for each other are complicated by the fact that they are making a porno together.
As the filming progresses, the production process becomes more and more chaotic, with arguments, technical difficulties, and miscommunications causing multiple setbacks. Nevertheless, Zack and Miri persevere through it all, driven by their desire to succeed and their growing love for each other.
In the end, their film is a success, and they manage to earn enough money to pay off their debts. However, the experience also brings them closer together, and they finally admit their feelings for each other, leading to a romantic conclusion that leaves their future uncertain but full of possibilities.