La película continúa con la aventura épica de los valientes Riko y Reg quienes se unen a su nueva amiga Nanachi. Juntos, descienden a la traicionera quinta capa del Abismo, el “Mar de los cadáveres”, en donde se encuentran con el misterioso Bondrewd, un legendario White Whistle cuya sobra cierne sobre el turbulento pasado de Nanachi. Bondrewd es increíblemente amistoso, pero los valientes aventureros saben que las cosas dentro del Abismo no son lo que parecen…
After Noboru saves Hayase from drowning by giving him mouth-to-mouth, Hayase grows confused about his feelings. It doesn't help that around the same time he meets Noboru's twin brother, Ryū, who has a very different, outgoing personality.
The Metropolitan Police Department '0'section, known as an organization in the police department that investigates a closed case. Well-trained detective in the '0' section, Ray, is looking for her memory that was lost during the training, while also investigating a human traffic which young woman being a victim. One day, classified killer virus was seized by rising terrorists. To investigate this case, public safety sent Sarah Kodama who specializes in molecular biology and computer, to work with Ray but Ray refuses to work with Sarah. Sarah was curious about mysterious Ray, she starts to collect Ray's information and goes to see Ray's former boss, Asami. However, the man who appeared in front of Sarah was an assassinator who contemplates destruction of '0' section. What happens to Sarah...!? What is in Ray's lost memories!?
Bonobono: Kumomo no Ki no Koto was the second theatrical Bonobono movie, released by Amuse Pictures in theaters in Japan on August 10, 2002. It was done completely in 3D.
