You stuck in the tower of Babel, on the fourth island, because Teruya locked everyone in a room to prevent another murder to happen, the only exceptions were Syobai, who was god knows where, and you, who were allowed to wander around the tower. You didn't know why Teruya didn't want to lock you with the seven others, but you didn't complain, because you could easily hide yourself when something is wrong. Of course, Teruya was also inside the tower.