A weak, F-rank dragon finds itself summoned as a contracted beast but is immediately scorned for its low status. Alicia Morse, the summoner, faces ridicule for wasting rare materials, and others urge her to discard the 'trash' dragon. However, she shocks everyone by removing the dragon's core to empower her higher-ranked beast, Thunder, triggering its evolution to an A-rank Thunder Bear King. Meanwhile, the dragon loses its core, downgrades to a salamander, and activates a mysterious Devouring Evolution System promising infinite growth. The episode ends with the dragon’s survival hanging by a thread and a new path to power opening up.