Coud Van Giruet has plans to be a great sky pirate, but when treasure ends up containing a young girl, he swears to protect her.

The Arc Aile members follow Cou and Ren, on their journey to Edel Garden.

Ren is kidnapped while everyone is at an inn; they have to infiltrate Beazon's castle to save her.

The gang saves Parl, who offers to help them escape from Beazon.

After trouble in a fight against Rig, an old friend of his, Cou asks Cisqua to train him to fight.

Cou tries to ramp up his training while Rowen works a part-time job.