After being killed in an explosion set by Desty Nova, Gally is brought back to life in the city of Tiphares by the resourceful yet devious scientist. She learns that the floating city is caught in a chaotic civil war over the public revelation of brain biochips, the Tipharean substitution to the organic human brain. To have any chance at stopping the bloodshed, Gally joins Nova’s newly-formed entourage, which includes his assistants Elf and Zwölf, the battle android Sechs, and the repair robot Deckman 100.

Tiphares and its conflict is just one small piece to an unknown star system that Gally has yet to discover. In hopes of finding more answers to her forgotten past, she and the other group members venture into the vastness of space, beginning an adventure that is set to alter the course of humanity.