It's been three miserable months since 13-year-old Chris Barton lost his little sister, Molly. "Missing, presumed drowned" was what the paper said, and surely that is what everyone believes. After all, the Bartons had been picnicking by the river when Molly disappeared.
One night, Chris views a video he made the day Molly was lost. There doesn't seem to be anything unusual here: a rest stop, lunch by the river, a hungry squirrel, a familiar ice cream van. But the video harbors an awful secret. In the middle of the night, Christ Barton wakes from fitful sleep—and begins a journey filled with fear, doubt, and impossible hopes.