"Mecha Soul" is a role-playing game based on western science fiction and mechs. The protagonist played by the player is extremely talented, but the elders in the family always disappear mysteriously, so the protagonist is regarded as unknown by the tribe and is excluded everywhere. One day, the protagonist was attacked by someone and managed to escape to a galaxy hundreds of millions of light-years away. This is one of the few safe areas in the universe that protects interstellar immigrants. After the protagonist arrives, the seal on his body is lifted, and a powerful supernatural power bursts out of his body, but he also loses his memory because of this. Since then, the protagonist has embarked on a journey of retrieving memories and finding himself... During the journey, the player will experience family, friendship, love, and adventures that he has never experienced before. At the same time, the two major military alliances in the interstellar world stand on equal footing, each accumulating strength, looking for an opportunity to defeat the other in one fell swoop. The mysterious forces add fuel to the flames, making the protagonist's errands the key to breaking the balance...