Die Pfefferkörner is a German television series produced by Der Kinderkanal. The peppercorns are five friends from Hamburg: Jana Holstein Coutre, Natasha "Tascha" Jaonzäns, Philip "Fiete" Overbeck, Cem Gülec and Vivien "Vivi" Overbeck, Fiete's eight year old sister. After school, the young detectives meet at a high level of a spice warehouse of the company Overbeck & Associates, which belongs to Fiete and Vivi's parents in the first part, but is later given to Fiete and Vivi to look after. Here, in the historic warehouse district, the five friends have their headquarters. With smarts, combined delivery and support of the Internet, they find their cases here. The detectives convict polluters, animal dealers and drug smugglers. They also help each other with personal problems they encounter. Cem has lost his parents in a car accident and sometimes feels sad and lonely. Jana lives with her divorcee mother, a lawyer who is rarely at home. Natasha comes from Latvia. Her parents initially have very strict rules in terms of her education, that make Natasha unhappy. Fiete has problems showing his feelings and hides them behind grumpiness and hostility towards girls, until he falls in love with Natasha. Vivi is suffering from her role of the youngest member of the group. She believes that she must constantly struggle for recognition.

Police officer Hella Christensen is on her way to her new job in Kiel. But she doesn't get far because a dead girl was found at the pier in her hometown. Hella's new superior, Simon Kessler, has already arrived from Kiel and is awaiting her on the bridge. Hella recognizes the dead person immediately: it is 14-year-old Jenni, daughter of her neighboring family. Kessler orders the recently defunct local office to be used to investigate the murder.