Defeat the Bandit's that snuck up behind you, and wait. Wait until the twenty-fourth turn, at which time the mist will roll in and 13-2 will start. If you're playing the Japanese version, there will be another square above Baldus' Hunter, where you can teleport Rosary/Roswell in order to get massive EXP, since Baldus' units will not retaliate. You can also take his item and kill him, and then do it again in 13-3 as part of the glitch.