When their parents disappear in the middle of the night, a cryptic picture message from their mother leads young sisters Summer and Bird through a familiar gate and into the woods, where the sad, electric song of a tiny patchwork bird draws them Down. In this ruined, frozen world of birds, their divided hearts will lead them in very different directions in a quest toward untied goals- vanquish the ravenous, bird-swallowing Puppeteer; help the birds...