In this electrifying installment of the Onyx series, Eren Yeager's world teeters on the brink of chaos once more. The empire's grip on the region tightens as new forces emerge to challenge its authority. Amidst the tumultuous landscape, Mikasa Ackerman finds herself at the epicenter of a brewing storm.

As the boundaries between man and monster begin to blur, Mikasa's loyalty is put to the test. Her unwavering dedication to her friends and comrades is matched only by her growing unease about the true nature of their enemies. The fate of Eren's family and the future of humanity hang precariously in the balance.

Meanwhile, a new player enters the fray, one who will stop at nothing to claim dominion over the Onyx region. With tensions escalating and allegiances shifting, the stage is set for an explosive confrontation that will decide the course of history. Will Eren and his allies be able to overcome their differences and face the coming storm together, or will the Onyx Storm tear them apart?