Before graduation, I promise to . . . learn to trust.Lyla McAfee can't wait for her senior trip to Florida. Nothing but sun, sand, and time alone with her boyfriend, Derrick.Too bad nothing goes as planned.Lyla's forced to hitch a ride to the airport with Beckett, the school player. Of course that leads to a nasty fight with Derrick. And to top it all off, she's sharing a hotel room with her two ex–best friends, Aven and Quinn.And then there's that email. The one she wrote to herself as a freshman and scheduled to be delivered right before graduation—an email promising that she'd learn to trust by the end of senior year. Which is ironic since she came up with the idea to message her future self with Aven and Quinn . . . right before they betrayed her.But now that she's gotten the email she can't ignore the promise she made to herself. Even if Derrick is acting strangely. Even if Beckett keeps showing up out of the blue. And, hardest of all, even if trusting her heart might get it broken.