In 2030 A.D. Aliens came to Earth but not friendly. The homeland of mankind got destroyed.

The only survivors were defending tough but still trying to seek any opportunity to turn the tide.

Until a high-tech device called 'Portal' was found in an abandoned research building by a little girl named Abby. 'Portal' is a kind of device that makes human flash back. Abby was extremely brave beyond her age, she was volunteered to be the first person for testing 'Portal', and she succeeded.

After that, Abby leaded survivors to fight back alien enemies. She brings the hope to victory, and would be named Glory of the Survivors.