Description：Bi Sheng and Bi Qi are both street brothels with a deep affection, and are collectively known as the two Bigs of Street. Because Sheng owed money for gambling, Qi asked her boyfriend Long to help her out, and she had a feud with Xiyangzai. Later, Qi was kidnapped by Xiyangzai. Sheng and Long went through life and death to find Qi, and gradually fell in love. After Qi was rescued, she discovered the relationship between Sheng and Long, and gradually became estranged from Sheng. On the other hand, Sheng met the old policeman Mai Sir and became friends. Mai Sir even had a father-daughter relationship with Sheng. Mai Sir tried to hunt Long several times, but was stopped by his boss Liang Sir. It turned out that Long was an undercover agent, directly under Liang Sir. Later, Liang Sir was killed by Xiyangzai, and Long was hunted down by Mai Sir, unable to prove his identity. Because Xiyangzai's private ring was busted, he kidnapped Mai Sir's son Xiaojie and forced Mai Sir to kill Long for him. In the crisis, Sheng, who was trapped in a sack, broke free and jumped out, and a bloody man rushed towards him.