During a balmy summer afternoon, when the sun warmed the air, a child heard bells tolling joyfully from the nearby mountain. Years later on that same peak, the mushishi of ancient legends Ginko meets a peculiar girl sprouting weeds from her skin. Shortly thereafter, Ginko stumbles upon the now adult Yoshiro leaving the mountain's ridge. With Yoshiro's aid, Ginko begins to discover who this enigmatic girl is and why she was cursed by an unseen force.
A rendition of the final manga arc, Mushishi Zoku Shou: Suzu no Shizuku tracks Ginko's strange expedition through the supernatural world in the quiet twilight for those who wander to solve the puzzle surrounding Kaya and the mountain that has become her refuge.