The main cybrary is under attack. Hacker has released a mysterious cyberbug that is systematically destroying certain information. Ms. Fileshare, the overworked cybrarian, is too busy to notice. When Hacker uses bar graphs to confuse Ms. Fileshare, the kids create bar graphs of their own to counter his distraction. Which graph will Ms. Fileshare believe? And what information is Hacker trying to destroy? Part of the "Cyberchase" series.