In 2103, the corporations have grown larger than the nations they replaced. Withmore City — a geodesic dome built in the wastelands of lower California, surrounded by a scarred and partially submerged landscape — is their achievement and their product. Its founder citizens built it with their lives; its population stratified into corporate drones above and the destitute below, with law enforcement authorized to act as judge, jury, and executioner anywhere in the city. Characters in Sindome carve out survival in the underworld, fighting the structural inequality the dome was built on. The game is played entirely through text in a persistent world shared by all players simultaneously.