 However, unbeknownst to Kakkō, Shiika is an escapee from a secret prison known as GARDEN where those possessed by the Mushi, known as the Mushitsuki, are held.GARDEN's military force, the Special Environmental Conservation Executive Office, dispatches its finest killer to track down Shiika.However, they are faced with resistance from the Mushibane resistance organisation, led by the secretive "Ladybug".