Beneath the icy surface of Cardis' third moon lies an abyssal city of pirates and vagabonds. The Undertow, once a mining facility, is now a sprawling Black Market haven. Accessible only by submarine, it's a dangerous but lucrative place, offering opportunities to those willing to take risks. A large war between the Greater Solar Union and the Marche-Donir Coalition provides profitable opportunities for Undertow's inhabitants. You arrive as a newcomer, a refugee, merchant, adventurer, or something else entirely, ready to navigate this lawless city.