A package comes in the mail for Keiichi and when he opens it, he finds what appears to be a porn video tape. Since Belldandy is out shopping, Keiichi pops it into the VCR and out of the TV steps a sexy woman who accidentally knocks him out. Before the woman can do anything about it, Belldandy returns home forcing the woman to cast a spell to disappear into the floor. Belldandy finds a dazed Keiichi on the floor saying something about a woman coming out of the TV. Since she can't make sense of what Keiichi is telling her, she casts a spell so that she can replay his memory. To her surprise and annoyance, she sees the image of her older sister - Urd.

Having been discovered, Urd reveals herself under Keiichi and introduces herself. She explains that she's come to recharge Belldandy's System Force. Belldandy is concerned about Urd's abandoning the Yggdrasil System of which she's the system operator. Urd assures her that Skuld is taking care of the system in her absence. Belldandy gets Urd to confess that she has another motive for coming to Earth - getting Belldandy and Keiichi more intimate. She's been watching and recording the couple for some time and is disgusted that they don't do anything and barely kiss. This really ticks Belldandy off and she immediately launches an energy attack against Urd. Urd deflects the attack causing it to strike Keiichi!

Later, Keiichi is relaxing in the tub when Urd comes in offering to wash his back. He turns her offer down and Urd suddenly understands why he and Belldandy haven't been intimate. She cast a command spell to get him to agree to her offer, but thoughts of Belldandy hold him back. She increases the power and again he resists. Finally, she goes to full power on the spell, but he is still unconsciously resisting her as he staggers around. Urd loses her temper and causes a lightning bolt to strike him.

Belldandy comes on the scene and rescues Keiichi. She's annoyed with Urd and explains to him that Urd often does things without thinking them through nor does she consider the consequences of her actions. She tells a story of something Urd did as a child, then informs Keiichi that Urd is really more powerful than she is. Belldandy is impressed that Keiichi was able to resist Urd's spell, but Keiichi confesses that only his thoughts of her got him through. Belldandy lovingly comes behind Keiichi and embraces him but before the couple can kiss, Urd opens the door on them spoiling the mood.

That night after Belldandy is asleep, Urd sneaks out of their room to Keiichi's room. He's lying on his stomach reading a book by lamp light. When he reaches for his bag of chips, he gets a hand full of Urd's breast. Urd tells him that he's the reason for the System Force failure as his genetic data has not been loaded into Yggdrasil. The only way she can recharge Belldandy's System Force is for Keiichi to sleep with Urd so that his genetic data can immediately go to Yggdrasil and solve the problem. Since Belldandy had told Keiichi that goddess's don't lie, Keiichi reluctantly agrees to Urd's plan. Before she can get him into the sack, Belldandy awakens and rushes to Keiichi's room. Keiichi explains and Belldandy irritated by Urd's lie. She decides to make Urd pay for this but before she can launch her energy attack, a lightning bolt strikes Urd, knocking her out. On the ground next to the unconscious Urd is a message from the Almighty One. As punishment for causing the System Force crash, Urd is exiled to Earth indefinitely.