Would-be amusement park aficionado Dalia only has two items on her summer bucket list: (1) finally ride a roller coaster and (2) figure out how to make a new best friend.

But when her dad suddenly announces that he's engaged, Dalia's schemes come to a screeching halt.

With Dalia's future stepsister Alexa heading back to college soon, the grown-ups want the girls to spend the last weeks of summer bonding, meaning Alexa has to cancel the amusement park road trip she's been planning for months.

Luckily Dalia comes up with a new plan: if she joins Alexa on her trip and brings Rani, the new girl from her swim team, along maybe she can have the perfect summer after all.

But the trip goes off the rails when Dalia discovers that Alexa's girlfriend is joining the trip. And keeping Alexa's secret makes Dalia realize one of her own: she might have more-than-friend feelings for Rani.