Flammenmädchen (2021)

First several barns burn down, then an old house goes up in flames: For months, one arson attack follows the next. A firebug, whom everyone fears and no one has been able to catch, is up to his mischief. When a body charred beyond recognition is finally found in the burned-out rubble of the abandoned house, the state police gets involved. The LKA officers Franzi Heilmayr and Martin Merana initially believe in pure coincidence - until circumstantial evidence suddenly points in a completely different direction, from which deadly danger emanates.