Based on the manga by Nakamura Nishiki.

An underground society lies underneath the the surface of Tokyo. This society has kept silent for quite some time, the good news is, they may be on the move. They may be kidnapping several micos, Hinomico, Mizunomico, Kazenomico and Tsuchinomico, and employ their powers to awaken the long forgotten "God". To prevent them from awakening this god, a gaggle of government special agents is dispatched to call each mico and protect them before they reach them. Why's the trick society wanting to awaken God? Who're these four micos? Who're these special agents? The long forgotten legend is awakening in the depths or darkness.