The Equation of Love and Death

Taxi driver Mi Li (Xun Zhou) keeps whispering about serious mysterious numbers, and the passengers in her car have to answer her question: Have you seen this man? Mi Li’s boyfriend Wen Fang has been missing for four years. However, during these time, he keeps writing to her to inform her of the latest situation but can’t find hime in person which causing a her mood under great torture.

On this day, she carried two drug dealers Shuitian Qiu (Baoqiang Wang) and Huogui Qiu who came to Kunming for a deal. During the transaction, they found that the “connector” fell off the bridge and died for no reason. In a great panic, Qiu Huogui got into the car in a hurry, which is Mi Li’s taxi tried to give a change to them. Mi Li took the opportunity to call the police, but then Shuitian Qiu blackmail Mi Li and threatened her to find his first love Xiaoxiang otherwise he won’t let her go.

The “connector” who fell off the bridge survived and went to the road for help, but the sudden car accident happened driving by Bing Ma ( Chao Deng ) and Feifei ( Ning Wang ). Bing Ma and Feifei were involuntarily involved in this murder case. Qingcheng Ye ( Hanyu Zhang ) and Mi Li, the policemen who happened to arrest the Qiu brothers, found Wen Fang’s trail – Bing Ma and Wen Fang look exactly the same! It’s just that Bing Ma’s attitute to Mi Li is very indifferent. Mi Li has waited him for four years, is this the end? Qingcheng Ye also began to doubt Bing Ma ‘s true identity.