Rex for the first time with a new master – Commissioner Alex Brandtner The once idyllic Central European metropolis of Vienna has not been spared the ravages of criminal gangs. The new member of the homicide squad may have envisioned his arrival differently, but police officers don't pick and choose cases. Commissioner Alex Brandtner will have to confront the mafia's tentacles the first time. Human life is at stake, and Alex and Rex must demonstrate not only human and canine ingenuity, but also physical fitness. Fortunately, the sympathetic young man soon manages to win the favor of his colleagues and the four-legged detective. Fresh reinforcement can do everything - even a parachute jump.