What will the world look like 50 years from now? That was the question back in 1959, when the pupils of an elementary school were asked to contribute their ideas on paper for the school's time capsule. The years have passed, and now, in the same school, Caleb Koestler, the son of John, a widowed astrophysicist, attends the event of the time capsule opening and receives a dull drawing consisted of mysterious and random numbers. It seems that the author was Lucinda Embry, a troubled child whose mind was riddled with whispers and strange voices and now her paper is in Caleb's hands. Intrigued by this inexplicable conundrum, John will attempt to decipher the string of numbers which seem to be references to dates and death tolls over a period of the last 50 years, with the concluding three sets of numbers pointing to the imminent future. In the end, with Caleb's mental health quickly deteriorating as he too is bombarded by the voices inside his mind and the increasing visions of biblical disasters, how could a single father help his troubled child and the rest of the world?