The gateway to another world appears suddenly one day and with its coming awakens two mysterious beasts of astonishing power. When the monsters appear to destroy each other, they vanish –leaving behind only the inexplicable pillar of darkness and the unanswered questions of the natural world.
12 years later, the twin children of two scientists who disappeared on the so-called Day of Conjunction go on a hazardous quest in search of their lost parents. Boarding a phantom subway, Ai and Yu travel to Wonderland, a chaotic world of amazing beauty and thrilling danger. Accompanied by Lisa, an enigmatic woman they meet on the train, and Kaze, a brooding stranger with a demon-summoning gun, the twins begin an incredible journey that will lead to the mysterious heart of Wonderland.