After forty years of freedom and hardship, Hokura, a former peacekeeper, is haunted by her past. Determined to confront her fears, she embarks on a journey to the walled city of Meridiana, unsure of what she will find. To her astonishment, she discovers that the city has transformed into a thriving sanctuary under a new governor, rising from the ashes of a civilian uprising.

With the guidance of the enigmatic professor and the support of the governor, Hokura is determined to liberate the old city and bring its inhabitants to the safety of the sanctuary. But as she delves deeper into the secrets of Meridiana, a web of love, lies, deceit, and betrayal unravels, leaving her questioning everything she thought she knew.

In a world where mankind is on the brink of extinction, Hokura's true destiny emerges, unveiling a captivating journey filled with unexpected twists and revelations. Will she find redemption and forge a new future, or will the shadows of the past consume her?