A UFO can be seen in the sky. Four sisters of the Negamoon family and Rubeus look down upon Tokyo and plot its demise. Having renewed their love for each other, Serena and Darien walk around and arrive at a dock. To their surprise, as they were kissing, a little pink-haired girl with a "meatball head"-style hairdo falls from the sky and lands on Serena. The girl gets up and demands the Silver Imperium Crystal from Serena. After Serena denies her, the girl disappears. When Serena gets home, she finds the girl, Rini, has moved into her house and brainwashed her family into thinking that she's Serena's cousin! Her mother even shows her pictures to prove that Rini is a part of the family. The Scouts meet at Raye's temple to try and discover something aboutthe mystery girl. Rini follows them and uses her magic to add sleeping powder to their tea. All the irls pass out except for Serena, who was too busy stuffing her face with cake to bother with the tea. Katzy appears and attacks both of them. Tuxedo Mask appears and offers some words of encouragement. Sailor Moon attacks back, but Katzy jumps to a nearby roof and disappears.