Aeon Geminix, 22, is a steampunk explorer in a dying age of steam. Wind-tousled hair, steady eyes, goggles resting in his crown, raised for expeditions beyond unstable Gates. He entered one with his twin, Faran. Only Aeon returned. A black crystal fused to his temple allows him to recharge depleted cores. The price is cruel: each use erases a memory of his brother. Aboard his self-built airship, the Hippocampus, Aeon hunts new dimensions for power, while Faran fades from his mind.