In Banana Split, high school classmates April, Nick, and Ben are a close circle of friends up until the summer before college when April and Nick, who have been dating for two years, suddenly break up. As Ben struggles to maintain both friendships, he introduces his childhood friend Clara who begins to date Nick — and covertly becomes best friends with April. Now Ben is stuck in the middle, hanging out with the two girls behind his best friend’s back. To further complicate things, Nick and April still have feelings for each other. Now everyone has a secret, and the group’s dynamic gets very complicated as they try to navigate their last few weeks together before leaving town.