The first night about small fir to accompany long Lisheng fair reading data into the night while asleep, suddenly heard a loud sound and wake up, found that the relevant information is "guard serial murder", after he took the flashlight to find that no one here, feel the trembling with fear, at this time the elevator to the voice of Ti second night outdoor teaching social studies in children, there is interest in the guard work, running West Branch, a little get dizzy with success of small fir asked the child what to do interesting things to make him happy, but the other never laugh no reaction, and lead to confrontation, third night about Li Zi Racecourse (Yoshida sheep) investigation of a woman in her ex boyfriend's wedding water case, because the transaction Guan Jing Hu (energy-saving) arrangement error, suspects and victims appear at the same time. Said from the prosecutor's office within the female's content, and small fir from seemingly cold men hear, together seems otherwise Nejo fourth nights (final) small fir slept in a dream to see yourself become a prosecutor, Li Zi when his officer, together to solve several cases of difficult cases, but in the end the suspect is a well households, is a former guard he mastered the big secret of small fir, but to small material pursuit,