Up-and-coming film students Della Cate and Khloe Mendosa have a final exam coming, and they need to recreate one of their favorite movie scenes to ace it. They absolutely love the sexual tension from the threesome scene in “Challengers,” so they try to recreate it at home. There’s just one problem: they need two guys to act as the tennis players. Without a better choice, they reach out to their stepbrothers, Ethan and Arin. The guys agree and try their best, but there’s just something not right about kissing a stepsister. The first rehearsals are pretty bland, with Della unsuccessfully trying to build some sexual tension with her stepbrother, Arin, and with Ethan. Khloe starts directing them carefully, and suddenly, things start to heat up. Instead of cutting the scene, Khloe keeps rolling and wants to see how far they will go. Soon, she finds herself in front of the camera, turning the Challengers threesome into a foursome with a creamy finale.