Golden boy Caplan and bookish Mina have been unlikely soulmates since third grade. Bound by growing up in single-mother households on the same cul-de-sac in Two Docks, Michigan, their friendship exists miraculously outside their high school’s social order. Mina is class valedictorian, expected by her late father’s parents to attend his Ivy alma mater; Caplan is laughing off prom-king predictions and the fear that he’s peaking too soon. When Cap’s skateboard-toting, detention-dodging best friend confesses his feelings for Mina, she is whisked into a social life she never imagined.

It’s Senior Sunrise, the epic overnight at the beach that kicks off senior year. But for Natalia and Ethan, it’s the first time seeing each other after what happened at junior prom—when they almost crossed the line from best friends to something more and ruined everything. After ghosting each other all summer, Natalia is desperate to pretend she doesn’t care, and Ethan is desperate to fix his mistake. When the senior class carries out their tradition of writing private letters to themselves—what they wish they would do this year if they were braver—Natalia pours her heart out. So does Ethan.

Georgia Woodward lives by her lists, none more so than the one about her ex, Eli Mora. It’s full of the ironclad dos and don’ts they’ve been following since she returned to the Bay Area after their cataclysmic breakup five years ago. With the wedding of their mutual best friend, Adam, looming, and them about to step into their roles as best woman and man, Georgia’s never needed it more. She refuses to threaten their tight-knit friend group with her messy—and still very present—feelings. The rules on that list will keep her cool, calm, and compartmentalized.

When Sophie Steinbeck finds out just before her wedding that her fiancé has cheated yet again, she desperately wants to call it off. But because her future father-in-law is her dad’s cutthroat boss, she doesn’t want to be the one to do it. Her savior comes in the form of a professional objector, whose purpose is to show up at weddings and proclaim the words no couple (usually) wants to hear at their wedding: “I object!”

After living through a dumpster fire of a Valentine’s Day, Emilie Hornby escapes to her grandmother’s house for some comfort and a consolation pint of Ben & Jerry’s. She passes out on the couch, but when she wakes up, she’s back home in her own bed—and it’s Valentine’s Day all over again. And the next day? Another horrendous V-Day. Emilie is stuck in some sort of time loop nightmare that she can’t wake up from as she re-watches her boyfriend, Josh, cheat on her day after day.