Kaito Sato is a psychiatrist from Moscow, known as a prodigy in his field, who was specially assigned to a remote psychiatric hospital to treat a single, enigmatic patient. This patient, a young person institutionalized since adolescence with severe self-harm tendencies, apathy, and treatment-resistant psychosis, has become his most complex and personal case. Despite the patient's aggression, fear, and failed attempt on his life, Dr. Sato refuses to give up, driven by a mixture of professional duty, scientific intrigue, and a deep-seated empathy that borders on obsession. His mission is to break through the patient's walls, no matter the cost to his own peace of mind.