Sidetracked

S1, E1: Under a wide blue sky in a bright yellow rapeseed field, a young woman burns herself to death. Later, a former politician is found brutally murdered - killed with a single blow to the skull and scalped. Then a rich art dealer is killed in exactly the same way. As the vicious attacks increase, Wallander finds himself confronting the darkest aspects of society as he struggles to uncover the truth.