"Triage X" is an action-packed anime series set in a fictional city plagued by crime and corruption. The story revolves around a secret organization known as Mochizuki General Hospital's Black Label, a group of skilled individuals who operate under the guise of medical staff. Their mission is to eliminate dangerous criminals who evade the justice system, effectively acting as a form of vigilante justice. The group refers to their targets as "cancers" that must be excised to protect society.

The protagonist, Arashi Mikami, is a high school student who becomes involved with the Black Label after a chance encounter with its members. Despite his youth, Arashi possesses exceptional combat skills and a strong sense of justice, making him a valuable asset to the team. The group is led by Dr. Mochizuki, the hospital's director, who provides strategic guidance and medical support. Other key members include Oriha, a skilled sniper with a calm demeanor; Sayo Hitsugi, a stoic and highly efficient assassin; and Mikoto, a cheerful and energetic nurse who also participates in missions.

The narrative unfolds through a series of episodic missions, each focusing on the elimination of a specific target. These missions often involve intense action sequences, strategic planning, and moral dilemmas, as the team grapples with the ethical implications of their actions. The series explores themes of justice, morality, and the consequences of taking the law into one's own hands. As the story progresses, the characters' backstories and motivations are gradually revealed, adding depth to their interactions and decisions.

The plot takes a darker turn as the Black Label faces increasingly dangerous adversaries, including a shadowy organization with ties to the city's underworld. This escalation raises the stakes and tests the limits of the team's resolve. The series balances its action-driven narrative with moments of character development and interpersonal dynamics, providing a multifaceted portrayal of its cast.

"Triage X" combines elements of action, drama, and thriller, delivering a fast-paced and engaging storyline. The series maintains a focus on its core premise of vigilante justice while exploring the complexities of its characters and the world they inhabit. Through its blend of intense action and moral exploration, the series offers a compelling look at the consequences of operating outside the bounds of conventional law enforcement.