In Tokyo Ghoul, Vol. 4, the story continues to explore the complex world of ghouls and humans. The protagonist, Ken Kaneki, struggles with his dual identity after being transformed into a half-ghoul. He is forced to adapt to the brutal world of ghouls, who feed on human flesh, while still holding onto his humanity. This volume delves deeper into Kaneki's internal conflict and his relationships with other characters, such as Touka, a ghoul who works at a café, and Amon, a CCG investigator hunting ghouls. Kaneki’s growing powers and moral dilemmas become more intense as he faces dangerous encounters and begins to understand the darker truths about both ghouls and humans. The volume also introduces new characters and tensions, setting the stage for the escalating conflict between the two groups.