Its randomly generated but a good rule of thumb is to make several saves, take any path leading out of that first chamber and then any path that will lead south (i.e.: make a save while in the first room, pick any path to the next room, make a second save and every time you enter a new room overwrite that second save). Each captured teammate will be in certain rooms such as the room with the dark purple tree and in the room you start off in. Keep in mind that as more patrols that spot you a meter will go up that will spawn Captain Planet-sized and it will start chasing you. Also, if it does spawn in a room you just entered and its blocking your progress just head back into the previous room and head back in to reset its position.