In the early morning of a rainy night, retired agent Chen Mo transformed into an "urban hero" and lurked in the ventilation ducts of skyscrapers to monitor the secret transactions of the underground gang "Qinglongmen". He learned that the other party would deliver a batch of mysterious goods and needed to eliminate the hostile force "White Tiger Hall". During the operation, he was suddenly attacked by another mysterious man. After a thrilling fight, he discovered that the attacker was his former "Dragon Group" comrade Su Qing. Su Qing, on behalf of the emerging organization "Shadow Pavilion", claimed that the target cargo contained a priceless ancient mirror from the Tang Dynasty, and the back of the mirror was engraved with fragments of the lost military book "Martial Classics General Essentials". What shocked Chen Mo even more was that the person in charge of Qinglongmen this time was actually Zhao Shanhe, the enemy who poisoned his captain back then. Faced with huge rewards and deep hatred, Chen Mo and Su Qing, old acquaintances, formed a temporary alliance under the neon rain screen and decided to join forces to rob the ancient mirror and take revenge within two hours before dawn. This begins a dangerous urban secret war.
