"Sycamore seed siblings Merwin and Louise must use their wits and imaginations to navigate a mysterious and often dangerous world, filled with talking plants, monsters, meteors, and the fear of never finding the right conditions to set down roots and become big trees"--

The reader's choices determine whether three friends will survive after being mysteriously transported back in time to the Neolithic Era, when humans were first learning to farm and harvest and to domesticate animals.