At the Special Investigations Bureau, a secret world of danger and intrigue unfolds. The mother, a powerful and enigmatic figure, oversees the training of elite secret investigators, known as the "Secret Investigators." Among them are Okita-kun and Nishijyo-kun, two officers who have been chosen for a critical mission. Their task is to infiltrate the hidden base of the human trafficking syndicate, Besvias, located on a remote, uninhabited island. The mission is not only to gather crucial data but also to capture the syndicate’s leader, Jack Fujimori.
As the mission unfolds, Okita and Nishijyo face intense challenges, from physical confrontations to psychological warfare. The effects of the powerful drug "Invia," used by Besvias to control its victims, linger on them, making their escape from the syndicate’s base even more difficult. Meanwhile, Sakura, a senior investigator and close friend to Okita, takes on a risky role to help them, despite being reprimanded for her command violation.
Back at the bureau, the mother and the head of the bureau, who is revealed to be Jack Fujimori himself, prepare for the next phase of the mission. The re-education program, a harsh but effective method used to break the will of the investigators, begins. The agents are subjected to intense physical and emotional trials, designed to push them to their limits and reveal their true strength.
As the mission continues, the bond between the agents grows stronger, and their determination to uncover the truth behind Besvias becomes unshakable. With the data secured, and the syndicate's base on the brink of destruction, the agents prepare for their next move—knowing that the fight is far from over.
