⁣Engine was a Giver, a person with the ability to breathe life into objects and draw out their power. Rudo, who has also awakened to the same power as a Giver, is scouted by Engine to join an organization called the "Cleaners," which defeats creatures born from garbage. In search of a way to return to the "Heavenly Realm" where he once lived, Rudo accepts the offer, but he immediately clashes with his mentor, Zanka.