Han Ji-hoon wakes up one morning with no memory of the previous night. His best friend, Min-jae Park, is dead and the police believe Ji-hoon may have been the last person to see him alive. As evidence begins to connect Ji-hoon to the crime, he starts questioning his own memories, his actions, and even his identity. What happened that night? And if Ji-hoon wasn't the one in control, then who was?