Start in Monbaraba. Speak to the townspeople to gather clues about their father's murder. You'll learn about a man named Balzack. Maya and Meena will perform at the local inn to earn money. This is a good opportunity to gain some initial gold for equipment. Purchase a Thorn Whip for Maya and a Chain Sickle for Meena, along with some basic armor. The enemies around Monbaraba are manageable, but be mindful of their MP usage.
Your investigation will lead you to the town of Endor (yes, the same Endor from Chapter 2). Travel there, fighting monsters along the way to gain experience. In Endor, you'll find more clues about Balzack and his whereabouts. You'll also learn about a hidden laboratory. Stock up on Medicinal Herbs and Antidotal Herbs. Save your game at the church in Endor before proceeding to the next area.