Heroes must use the power of the battle discs to protect their home planet from the dark forces.

In order to resurrect an ancient guardian named Red Dragon, Vulkay and a handful of other cadets are training at the Academy to become HEROES--whose sole purpose is to hunt down and collect Battle Disks. The Battle Disks, which allow HEROES to create and summon monsters to aid them in battle, are fabled to be pieces of Red Dragon's spirit. Vulkay and his friends must use monsters to locate every Battle Disk scattered across Planet Aernia, as they'll need Red Dragon's help to fight against the dark forces that are gathering to destroy the world.—Tubi TV

The story is set in the galaxy located near the center of the universe. There are Planet Aernia (a planet for Heroes) and Planet Orbs (a planet for robots), governed by Orbiton, in this same galaxy. Various countries are present in Planet Aernia; they are, Volculm (volcanic country of fire), Zylan (oceanic country of water), Elvan (green-rich country of forest), and Aleum (celestial country of clouds). Antania, is a nucleus of all the present countries. It has an academy that fosters Heroes. Under the reign of the Governor General, Antania upholds a national policy to train Heroes to prevent Planet Aernia to be infringed by the Dark Desire. Heroes are not only the reliable source of battle who have special abilities to freely use the battle discs, but also a symbol of unfailing justice.—Anime News Network

On planet Aernia, Vulkay teams up with other heroes-in-training to master the power of the battle disk and stop Orbiton from taking over the galaxy. Armed with magical disks, these heroes are ready to protect Earth against anything. Monsters? Aliens? Bring 'em on.—Netflix Argentina