Twelve-year-old Abby has a lot to worry about: Climate change. The news. The Great Pacific Garbage Patch. And now moving to Florida for her mom's new job at an aerospace company.

The Space Coast is nothing like home, and her mom's relentlessly positive attitude isn't helping Abby settle in.

Then Abby meets two boys, Adam and Bix, who tell her they're a long way from home and need her help. Abby discovers that they're from the future and that in their time, the problems of the present have been solved. She strikes a deal with Adam and Bix: She'll help them--if they let her come to the future with them.

But as they race to complete the boys' mission, Abby starts to wonder if they're hiding something from her. Is the future really as perfect as they say? And will Abby be making the right choice if she abandons her own time?