Reporter Sun Ling secretly installed surveillance in the Han Group for investigating the case of her husband Wei Kang being burned, but the suspect Han Group boss Han Pei discovered it.Han Pei sent Chen Guang to sneak into his home. After Sun Ling returned home, he threatened her to delete the surveillance video and its backup.When Sun Ling happened to go home and turned on the computer, he called the fire-transmitter Xu Tongsheng, hoping to thank him for his help in investigating the case. After being held hostage by Chen Guang, he could only pretend that he accidentally dialed the wrong phone number.Chen Guang did not find any abnormality, but Xu Tongsheng found out that it was wrong through Sun Ling's wrong name and called the police cautiously.Shen Ye, deputy captain of the Criminal Investigation Brigade, led a team to the scene. When the police officer Huang Qi was unlocking the lock, he was noticed by the cunning Chen Guang. He threatened the police to evacuate the residential building with the safety of the hostages and arranged for him to transfer the vehicle.In order to facilitate his own movement and put pressure on the police, Chen Guang arrogantly cut off the natural gas pipe in the kitchen, making it impossible for snipers to snipe.When Shen Ye was in a dilemma, Xu Tongsheng, as the fire department consultant of the fire department, showed his certificate and provided new ideas.According to his professional calculations, increasing the supply of natural gas and making the natural gas concentration exceed the explosion limit is the fastest way to rescue hostages.