With three of the four antidote compounds in hand, Momoko and Koushi move on to face their most fearsome opponent yet - Tenga Koganei! As the poison creeps ever closer to her heart, Momoko falls to the fierce leader of the Tiger Clan. Recognizing that there is little glory in defeating a weakened warrior, Tenga willingly hands over the final ingredient of the concoction that will save Koushi and Momoko. But there's a catch: There is only enough antidote to save one of them!