Problems with the Goddess Assistance system are rising because of Belldandy's unstable heart. A new girl shows up at the temple; it's Belldandy's kid sister Skuld! She's there to deal with the computer bugs, but also has an ulterior motive, to bring Belldandy back to heaven. To complicate things, Skuld's invention isn't working, and the "bugs" continue to plague the system, doing all sorts of weird things. Can Keiichi and Skuld repair the machine in time, and will Belldandy have to return to heaven?