The girls' boarding school in Heiligendorf was previously exclusive to girls - but a new decision by the Ministry of Culture forces the director, Mensendiek, to take in four male students as a trial: The quiet Jo, the womanizer Leo, the rebel Maus and the shy Toby; they already think they are in paradise in the midst of ninety girls, but soon they find that they are not welcomed by everyone. The headmistress has found like-minded people in boarding school spokeswoman Billy and man hater Vera in order to get rid of the four troublemakers as soon as possible.