In this new series, two years after Ginga's battle with Dark Lugiel ended, Hikaru and Tomoya joined the UPG (Ultra Party Guardians) after countless monster sightings appeared. Also, an Alien Chibu named Exceller plans to steal the Victorium Stone which believed to contained mysterious powers that located deep underground the Victorian civilization. Due to this, Shou, a Victorian Prince was sent by his mother to retrieve it with the help of Victory Lancer which enable him to become the ancient Ultra, Ultraman Victory.

Some time prior to the start of the series, a great war named the Dark Spark War raged between the sides of good and evil. These two forces were represented by the participants, the Ultramen and their allies fighting for justice against the monsters and evil aliens from various universes. During this great conflict an unknown being appeared wielding an object of great dark power called the Darkness Spark. With it he transformed all the combatants into figurines called Spark Dolls (スパークドール Supāku Dōru). In response, an Ultraman named Ginga appeared with a similar item wielded by the dark elusive figure and fought him. Ultimately he lost, and his item fell to Earth with his Spark Doll within it. A young man named Hikaru Raido eventually stumbles across an item called the Ginga Spark (ギンガスパーク Ginga Supāku), the same wielded by the Ultraman, it not only allows him to become Ultraman Ginga, but also allows him to go UltraLive (ウルトライブ Urutoraibu^?)^[2] with the figures to change them to their rightful size and become one with them. Hikaru fights with his friends to uncover the darkness behind the Spark Dolls. Alien Nackle drops a clue that the wielder of darkness resides in their very elementary school.

In the final episode, the master of darkness, Dark Lugiel reveals himself. He destroys the elementary school before proceeding to defeat Ginga. When all hope seems lost, Ultraman Taro regains his true form and rises to fight Dark Lugiel. He manages to revive Ginga before being defeated himself, and Ginga and Lugiel have an intense battle on the moon, ending with Lugiel's defeat. Ginga and Taro say their goodbyes to Hikaru and friends as they leave Earth for their homeland.