In Tang Ren's large family, there is a special nephew named Xiao Tang.He has a characteristic that people can notice at a glance - he stutters.But this does not prevent him from becoming an extremely smart and perceptive young man.Xiao Tang is proficient in English and has a natural sensitivity and aversion to lies, which makes him always appear particularly cautious and alert in interpersonal interactions.

Although Tang Ren always jokingly calls him “Xiao Tang”, Xiao Tang has deep contempt for some of his cousin's childish behaviors.He likes detective novels and especially admires the famous detective Quinn. He admires Quinn's reasoning logic and insight.This also allowed Xiao Tang to develop an excellent reasoning ability.

Xiao Tang has an ideal, that is, to complete a perfect crime.He has no intention of actually committing the crime, but rather hopes to further hone his reasoning skills by studying the perfect crime.However, this ideal gradually changed after he met Tang Ren.

The Bangkok Gold Case was the first major case that Xiao Tang and Tang Ren worked together.Faced with complicated clues and suspects, Xiao Tang showed amazing analytical skills.He observed carefully and reasoned calmly, and finally helped Tang Ren uncover the truth.In the New York serial murder case, Xiao Tang relied on his keen sense of lies to identify the real murderer.

The successful cracking of the two cases made Xiao Tang stand out in the detective world.However, he did not feel complacent about this. Instead, he understood a truth: a real detective must not only be able to uncover the truth, but also prevent crimes from happening.

At the New York airport, Tang Ren suddenly decided to go to Tokyo.Although Xiao Tang was a little surprised, thinking about Tokyo, a city full of mystery and unknowns, he couldn't help but ignited new expectations in his heart.He knows that his detective journey is still long, and what awaits him ahead will be more challenges and opportunities.