Fortuna Magus

Amane and Tia are determined to find their missing father. One day, they encounter a magus who bears the same mysterious mark their father had on his arm. They offer him a room for the night, only to find themselves on the other side of the law for aiding a known magi! What happened to their father? What is Ret looking for? And why are the magi being persecuted? Little by little, the wheels of fate begin to turn...