You find yourself trapped in a small cubic room. Dark water pours out of ancient sluices, rising to your waist, then chest, then neck. Your very bones seem to vibrate with the unceasing thrum of the heart of the city. Pushing panic aside, you press glowing nodes and panels in a futile attempt to drain the chamber, but to no result. Gulping a few last breaths, you dive down, searching for any way out. You just barely squeeze through a massive sluice, struggling against the current. At long last, you tumble out into a deep reservoir filled with icy black water. Below you, the silhouettes of star spawn swim slowly, inexorably toward you. They move without haste, for they know that there is no rush: you have no escape.