The Peppercorns

While doing research for the school newspaper, Vivi discovers that the boulder from the Elbe has been sprayed with graffiti. Excited passers-by think Vivi is the culprit herself. The sprayer Anka helps her to escape. Vivi notices that Anka is being accused by her graffiti crew of having 'bombed' the boulder on her own, contrary to the agreement. When Anka is gone, leader Mike calls on the others to get back at her. Anka denies having sprayed the rock. Natascha is sent undercover to infiltrate the graffiti crew. The sprayers are indeed planning an attack on Anka's villa...