When college student Keiichi Morisato dials the wrong number while ordering food at his dormitory, he accidentally connects to the Goddess Hotline, and a beautiful goddess named Belldandy appears from a mirror in front of him. After being kicked out of the dorm, Keiichi and Belldandy move to an old shrine, and soon after, Belldandy's sisters Urd and Skuld move in.