When twins Greta and Feliks lose their beloved Aunt Gisela to a poisoned marzipan cake and are sent to the ill-omened Schwartzgarten Reformatory for Maladjusted Children it seems their fate is sealed... that is until they are rescued by the glamorous and wealthy Olga Van Veenen, a fabulous children's author. The two twins are grateful but something tells them that Olga's motives are not entirely genuine.