Radiant manga volume 18 features story and art by Tony Valente.

Having escaped from the clutches of the Domitors, Seth and his allies hang out at the wizard Hurlä's laboratory to learn more about Fantasia and the Domitors, the Inquisition, and other enemies past and present. Elsewhere, ex-Domitor Lupa teaches Seth's friend Mélie how to work with Lil, the Nemesis she's recently bonded with.

In the meantime Torque, head of the Inquisition, institutes new citywide security measures in Bôme to ward off further Domitor attacks while the Domitors prepare the launch of their mysterious Project Tartaros.