"Shingeki no Kyojin: Totsuzen no Raihōsha - Sainamareru Seishun no Noroi" is a two-part original video animation (OVA) set within the broader narrative universe of "Shingeki no Kyojin" (Attack on Titan). The story takes place during the early days of the 104th Cadet Corps training, focusing on a group of cadets, including Eren Yeager, Mikasa Ackerman, Armin Arlert, and others, as they face an unexpected crisis.

The plot begins with the cadets participating in a routine training exercise in the forest. During the exercise, a sudden and mysterious fog envelops the area, causing disorientation and confusion among the group. As the fog thickens, the cadets encounter a series of bizarre and unsettling events, including the appearance of a Titan-like creature that seems to defy the known behaviors of Titans. This creature, referred to as the "Abnormal Titan," exhibits unusual intelligence and agility, posing a significant threat to the cadets.

Amidst the chaos, the cadets must rely on their training and teamwork to survive. The story delves into the dynamics between the characters, highlighting their individual strengths and vulnerabilities. Eren’s determination and impulsiveness, Mikasa’s protective instincts, and Armin’s strategic thinking are all put to the test as they navigate the perilous situation. The narrative also explores the psychological toll of facing an unknown and unpredictable enemy, emphasizing the fear and uncertainty that come with their circumstances.

As the cadets attempt to regroup and devise a plan to confront the Abnormal Titan, they uncover clues suggesting that the fog and the creature may be linked to a deeper, more sinister force. The story builds tension through a series of close encounters and narrow escapes, culminating in a climactic confrontation with the Titan. The resolution of the conflict sheds light on the resilience and resourcefulness of the cadets, while also leaving lingering questions about the nature of the threat they faced.

The OVA serves as a self-contained story within the larger "Shingeki no Kyojin" timeline, offering additional insight into the characters’ development and the challenges they endure during their training. It maintains the series’ signature themes of survival, camaraderie, and the struggle against overwhelming odds, while introducing a unique and standalone narrative that complements the main storyline.