Deep in the vastness of space, an alien species thrives. In the year 2002, one of these alien beings crashes it's spacecraft into Mount Ibuski, Japan and is captured and contained in the National Institute of Space Science. Soon after its arrival at the institute, the alien creature, which will ultimately be known as Daggra, relays a distress call to its Mothership. In time, the creature is killed, forging a deep hatred for humans, which prompts the entire Daggra race to start a great war against the humans. The Daggra use an armor suit to protect their small, delicate bodies in combat. Their technology is light-years beyond that which the human race possesses, including a disguise that cloaks their space fighters as jets and airplanes. With their superior technology, they wiped out nearly the entire population of the human race, save a small group of survivors hiding in Tibet, until 2084...

The remaining human population built a time machine called the Time Shifter, which a young woman named Milly used to return to the past to prevent the war from starting. Soon enough, Milly teamed up with Miyamoto, a skilled martial artist and trained gunman. When they finally found the Daggra at the space science institute, they realized that the creature mustn't be killed, but instead brought back to its own world.

Mizoguchi, a man of almost equal skill to Miyamoto, stormed the institute almost exactly when Milly and Miyamoto did, for his prize was the Daggra spacecraft and its pilot. Milly and Miyamoto were forced to run while Mizoguchi relocated the Daggra to an oilrig out in the middle of the ocean. With only a few hours until the Daggra invasion, Milly and Miyamoto gave a heroic effort to save the alien. After some intense combat with Mizoguchi and his men, Milly and Miyamoto rescued the Daggra and returned it to its civilization.

The year was 2084 A.D. The human race was at war with a technologically superior race of alien beings called the Daggra. These people from another world were naturally weak compared to humans, but because of their technological prowess, they managed to forge a protective armor suit. This Daggra armor suit was a perfect design for their war effort, as these creatures dominated the Earth not only with their highly advanced spacecraft, but also with their sophisticated ground troops. Nearly every human being on the planet was eliminated...

The Daggra not only used the armor suit for protection, but also equipped these machines with weapons that enhanced the Daggra's strength. The Daggra could easily break through any form of resistance with their powerful shoulder cannons. If, for example, there were a large group of hostiles, the armor suit could release a homing bomb from a special tail-like apparatus. Shields generators were also present, which created a powerful barrier that could not be pierced by any bullet.

One day, humankind's leftovers were landing their harriers in a secret facility. All seemed routine, but they were all deceived... One craft was, in truth, a disguised Daggra spacecraft! Inside the vessel was a small strike force of Daggra ground troops, each fitted with their special armor suits. With the power of their weapons and shields, the Daggra stormed the Tibet base and took siege within minutes. The Daggra only took one prisoner, while every other human in the base was quickly dispensed with. All would have been lost however, if it weren't for one human named Milly, who escaped into the Time Shifter and ventured into the distant past, in an attempt to save the future!