Independent filmmaker Jon Foy walked out of his Philadelphia subway stop and noticed a tile embedded in the street. Its bold red letters contain a cryptic message: Toynbee Idea in Movie 2001. Resurrect Dead on Planet Jupiter and Foy realised that it wasn't just any tile. In fact, Foy soon learned that there are hundreds of these Toynbee Tiles containing the same strange message all across Philadelphia, and in neighbouring U.S. cities, and then across the globe. With the help of researchers Justin Duerr, Steve Weinik and Colin Smith, Foy set out to find the person responsible for the Toynbee Tiles and the result is this fascinating and wonderfully quirky debut feature documentary.