Following her grandfather's last will and testament, Kairi visits Golden Valley, a city designated as a special economic zone for the game "Dark Machine," where she encounters Rudra, a girl on the run from pursuers. Guided by Rudra, she arrives at the café ship Carbuncle, where she learns that if she reaches the top in "Dark Machine," she will be able to meet "Senki," the person her grandfather mentioned in his will. Her encounter with Rudra leads Kairi to play the game "Dark Machine." By chance or fate, Kairi's destiny begins to unfold.
