The story begins with Zinjin, the Galactic Warrior, whose physical body is destroyed in a battle against the evil Baron Ricks. Despite his physical demise, his indomitable spirit remains, ready to fight against the odds.

In his ethereal form, Zinjin manages to possess a prototype metal sonic, gaining a new body to continue his mission. He must adapt to this unfamiliar form, learning to harness its unique capabilities.

Meanwhile, Sonic and his friends, unaware of Zinjin's plight, continue their routine adventures. Their peaceful day gets interrupted when they encounter the possessed metal sonic, sparking a tense confrontation.

The tension eases when Zinjin reveals his true identity and his mission to defeat Baron Ricks. Sonic and friends agree to join forces with him, forming an unlikely alliance.

The rest of Sonic's friends, Shadow, Rouge, Omega, Silver, and Blaze, also join the team. Together, they are a formidable force, ready to take on Baron Ricks and his minions.

Meanwhile, J.J, Champ, and Apple, members of the White Knights from the Zillion universe, hear about Zinjin's situation. They decide to join the fight against Baron Ricks.

Sonic and Amy, powered by the chaos emeralds, transform into their super forms. Together with Zinjin and the rest of the team, they launch their final assault on Baron Ricks.

The battle is fierce, but their combined power overcomes Baron Ricks. With his defeat, Zinjin's soul is finally free. His mission accomplished, he thanks his new friends before fading away.

Sonic and his friends bid farewell to Zinjin, promising to remember his bravery. As they return to their normal lives, they carry with them the spirit of Zinjin, the Galactic Warrior.