About the boy Jens, who not only adores sweets, but also really hates brushing his teeth, so two mischievous little people live in his mouth - Bug and Bacteria. They make their home in Jens's teeth and have fun until a toothache forces Jens to visit the doctor. Tooth trolls are such fun pests that they are sometimes more sympathetic than their lazy host. They not only make you laugh and play, but also teach you no worse than preachy uncles and aunts. In the play, negative characters that cause dental diseases are created very playfully, using an attractive world of imagination, avoiding preachy didacticism and open morality. An attractive and playful acting plot should make a reasonable argument for why you need to brush your teeth, avoid sweets or visit the dentist on time.