The story takes place after the events of the Rainbow Dragon Cave. The market god spoke plainly: ability cards would spread, their value would fall, and the market would return to normal. Instead, the cards keep rising in price. Someone is either deliberately manipulating the market, or collectors are driving the demand to levels the god never anticipated. Either way, the black market has opened — a trading ground that operates entirely outside the god's reach — and the situation is not resolving itself.