西比尔、娜拉、阿基蒂奥和珍是姐妹。西比尔和娜拉是淘气的姐妹，而珍和阿基蒂奥是乖巧的姐妹。西比尔和娜拉总是出去玩，和坏人混在一起，惹是生非。所以她们被禁止外出，必须待在家里，否则父母就不会再给她们零花钱了。但是，如果父母现在不在家，她们就不知道父母的命令，所以她们可以随时出去！珍发现姐妹们打算违抗父母，于是告诉她们她要去告诉继父。娜拉和西比尔已经准备好去玩了，谁也别想破坏她们的计划！于是她们抓住继妹，把她“捆”了起来！她们先把她的胳膊绑在身上，然后用袜子和一大卷胶带封住她的嘴。她们先用保鲜膜把她捆起来，最后再用胶带封住。当阿基提奥过来看到这一幕时，女孩们决定也把她做成木乃伊！“MMMMMMMMMMMMMMMPPPPPPPPPPPPPPPPPPHHHHHHHHHHHHHHH!!!!!!!!!!!!”。这样一来，西比尔和娜拉就可以出去玩了！Sibyl, Nala, Arkytior and Gen are sisters. Sibyl and Nala are the naughty sisters, while Gen and Arkytior are the good ones. Sibyl and Nala are always partying, going with bad people and getting into problems. That's why they are not allowed to go out anymore, they have to stay home or their parents won't give them more money. But, if their parents aren't there now, they can't know it, so they can go out whenever they want! Gen notices her sisters are planning to disobey, so she tells them she's gonna tell step-daddy. Nala and Sibyl are ready to party and there's no way anybody is going to ruin that! So they grab their step-sister and mummify her! First they secure her arms to the body. Then they gag her with her socks and a huge tape gag. They mummify her first with plastic wrap and then with tape. When Arkytior comes and sees what's happening, the girls decide to mummify her too! “MMMMMMMMMMMMMMPPPPPPPPPPPPPPPPPPHHHHHHHHHHHHH!!!!!!!!!!!”. This will keep them quiet while Sibyl and Nala are out partying!