20-Year-old Chen Yu, as a junior at the Criminal Investigation College, spends his days dawdling around. No one thinks he has anything to do with solving the case. Until that day, a deduction simulator system calling himself "Xiao Qi" bound him, and everything changed.
The poisoning case caused by a cup of milk tea seems simple but is full of mystery. With the help of Xiao Qi, Chen Yu embarked on a journey to solve the case, but the shadow of the mysterious organization "Dark Entropy" loomed behind the case. As the case progresses, villains such as yandere, hypocrite, and resourceful villains appear one after another. Each case is like a chess game carefully designed by "Dark Entropy".
Can Chen Yu, with Xiao Qi's company, grow from a rookie to a legendary detective and uncover the true face of "dark entropy"? The truth is far more shocking than imagined...