After the trouble at the hot springs, the girls get an opportunity to promote a local legend. After they fail to chicken out, their next gig involves a train to Kashima to steal a muddy spotlight.

It's been a long time since Saki used to fight an army of rival bikers in the darkness, but an unexpected encounter with the family of an old friend draws her into back into the kind of rough scene that could be anathema to her idol activities.

A devastating defeat has sent the girls in Franchouchou scrambling for cash to pay off a serious debt, while their producer, Kotaro, falls apart... but all of that will only be prelude as the zombie pop idols prepare for their REVENGE!