Beast-SD narrates the adventures of Daiki, an eleven-year-old boy who, for reasons of fate, obtained his first Beast from the hand of the Battle-SD world champion.

Beasts are ancient creature spirits that were digitized into small SD memories in order to be used by the Glova in their battles.

Daiki must improve his skills and surpass the rest in order to achieve his personal goal: to regain the love of his childhood friend, who coincidentally, is one of the five best Glova in the entire region.