TeeTee has disappeared! The seven friends Cosmo, Snackie, Lena, Ben, Sara, Saha and Junis miss the peculiar but helpful elderly lady who used to walk around in the neighbourhood with her »magic bag«. As the police doesn’t take the children seriously, they decide to take things in their own hands. Why did Lady TeeTee disappear and where could she be? The friends find out that TeeTee has been living in the old villa nearby in which she has also given shelter to others in need. Has the dentist kidnapped her? Is Ben’s Dad involved? The children persistently follow clue after clue and finally find out about a case of grave injustice… In the end, they do not only save TeeTee but with her the villa and their inhabitants.