Amos and Marlo have always been best friends. From hiking trips to backyard camp-outs, from playing soccer at the park to sitting together at lunch, they did everything together — until this past school year, when it all fell apart.←
Out of nowhere, Amos stopped talking to Marlo, and she has no idea why. Embarrassed and angry, Marlo distracts herself by looking forward to an end-of-year canoe trip with her mom. A special wilderness adventure, just the two of them (and their dog).←
​​​​​​​But when they arrive at the trailhead in the Alaska wilderness... there's Amos! Their parents have surprised them with a trip together. Things couldn't be any worse.←
​​​​​​​During the trip, Marlo and Amos do their best to avoid each other at all costs... until their parents pair them in a canoe together. When they start arguing, Amos and Marlo don't notice that the grownups' canoe has disappeared.←
They've taken a wrong turn — and they're heading straight for a waterfall.