Set on the eve of Flatland's first mission into their 'outer-space,' the story presents the intriguing mysteries of triangles with angle sums greater than 180 degrees and flipping into dimensions that are literally out of this world.

Flatland tells the story of a square named A. Square, who lives in a two-dimensional world where all beings are geometric shapes. One day, A. Square encounters a sphere, a being from the third dimension. This revelation shakes the very foundation of Flatland society, as A. Square embarks on a journey to explore higher dimensions and challenge the strict social hierarchy of his world.