There is a rumor going around about buildings disappearing on an urban legend website. Hiro and the gang go to investigate a certain cave with people from the forum. As they go deeper into the cave, terrible things happen…
Hiro's study files!
!ملفّات دراسة هيرو
Hiros Lernaufzeichnungen
¡Los archivos de Hiro!
¡Los archivos de Hiro!
Les observations de Hiro !
sui 
Digimon
Arquivos de Investigação
de Digimons do Hiro!
Познавательные уроки от Хиро!