DIE SIEBEN FEUER DES TODES (1997)

Firefighters Stefan and Johannes and psychologist Marta Weber, Stefan's girlfriend, are targeted by the psychopathic arsonist Kovacz. Johannes is killed by an insidious firebomb in an attack on Marta's apartment. Apparently the arsonist also dies in the flames, but his body is never found. Stefan fears that the madman is still alive...