Every crime has an answer! Crimes are becoming more diverse every day... To counter this, profiler Kwon Il-yong has opened a specialized training school to discover 'Secret Profilers'! Joining them are Seo Jang-hoon, a huge crime drama enthusiast, Lee Jin-ho, who has sharp instincts, Kim Min-ah, a mystery movie buff, and various other aspiring profilers! Can they all clear the 'step-by-step real crime deduction quizzes' and become the 'Secret Pula-Fileurs' who will save the world?