During a road trip, thirteen-year-old Olivia, a budding photographer, tries to recreate a Treasure Hunt she once shared with her sixteen-year-old sister, Ruth, while watching for signs that Ruth's depression is back. Olivia is on the road trip of her dreams, with her trusty camera and her big sister Ruth by her side. Three years ago, before their family moved from California to Tennessee, Olivia and Ruth buried a time capsule on their favorite beach. Now, they’re taking an RV back across the country to uncover the memories they left behind. But Ruth’s depression has been getting worse, so Olivia has created a plan to help her remember how life used to be: a makeshift scavenger hunt across the country, like pirates hunting for treasure, taking pictures and making memories along the way. All she wants is to take the picture that makes her sister smile. But what if things can never go back to how they used to be? What if they never find the treasure they’re seeking? Through all the questions, loving her sister, not changing her, is all Olivia can do—and maybe it’s enough.