In Death Note, the struggle between good and evil is portrayed through the complex relationship between Light Yagami, who uses the Death Note to rid the world of criminals, and L, who aims to stop Light's vigilante actions. The series delves into the moral implications of Light's actions and whether his pursuit of justice justifies the heinous acts he commits. Additionally, the Shinigami (death gods) in the series also add another layer to the exploration of morality and the consequences of wielding such power. Ultimately, Death Note challenges viewers to consider where the line between good and evil truly lies and the consequences of crossing it.