The year was 2045. The city, once a vibrant tapestry of life, was now a ghost town. The Crimson Tide, a merciless plague, had swept through, leaving behind a trail of despair and silence. Feverish delirium, followed by a swift, agonizing demise, became the grim reality for millions.

Twenty years later, the survivors, haunted by the specter of the past, lived in fear of a resurgence. The Crimson Tide, they believed, could still linger, dormant yet deadly. A ruthless regime, obsessed with eradicating any trace of the infection, had risen to power. Their enforcers, clad in biohazard suits, hunted down suspected carriers with chilling efficiency.

Deep within the heart of an ancient forest, a forgotten school stood as a testament to a bygone era. Here, in the shadows of towering trees, a group of seven teenagers, their past shrouded in mystery, had found refuge. Were they innocent, or harbored the insidious seeds of the Crimson Tide? The enforcers, driven by paranoia and a thirst for absolute control, were closing in.