Felix Winterberg is the great-great-grandson of the famous Albert Einstein and himself a recognized physics genius. Because of a deadly hereditary disease, the brilliant researcher only has a few years left - which he wants to make as labor-intensive as possible thanks to various illegal stimulants.

Former secret government agent Max Hecker (Sven Martinek) disguises himself with a clown mask in order to fight international crime. He hangs up his mask when one of his supporters, journalist Claudia (Diana Frank), is murdered. Four years later, he must put it back on as Claudia's sister Leah (Eva Habermann) is kidnapped by the same people that killed Claudia.

A long-running German television series about a two-man team of highway police, originally set in Berlin and later in North Rhine-Westphalia.