Pensioner Gerda grabs burglar Simon (armed with a harpoon) and forces him to be her carer. Anything is better than the nursing home to which she was taken by her daughter Linda. When the daughter has to move in with her mother because her apartment has become a permanent building site, things really start to get "funny".

Does the mask of the Makonde really have magic powers and can it settle the terrible quarrel between Johanna and her best friend? Johanna desperately needs the mask, but before her eyes it is stolen from Leipzig's Grassi Museum and Grandpa Kito is considered the prime suspect! Kito has just appeared from Tanzania and wants the mask, brutally stolen in colonial times, to return to his village. For Johanna, there is more at stake than unmasking the real thief - she must find her own identity.