Red shouldn’t have picked up the letter. Shouldn’t have betrayed her people. Shouldn’t have replied. But she did, and now nothing will ever be the same again. Red is a time traveler working for the Agency, a technotopia, while Blue is an agent for the Garden, a vast, organic entity rooted in nature. As rivals, they travel through strands of alternate realities and dimensions, influencing them to guide the path of the future in an all-encompassing war. They were made to be enemies — so why does it feel so right when they craft the words that bridge the untraversable gap between them?