Zankyou no Terror, also known as Terror in Resonance, is an anime series that revolves around two mysterious teenagers, Nine and Twelve, who form a group called Sphinx to carry out a series of cryptic terrorist attacks in Tokyo. The story delves into themes of trauma, friendship, and societal issues, while keeping viewers on the edge with its suspenseful plot and complex characters. The series captivates with its unique storytelling, thought-provoking themes, and stunning animation.