The underworld figure Ma Tian changed his ways, but in order to repay a former human debt, he resolutely joined the gang business again. Unexpectedly, this transaction forced Martin to fall into a trap and was sandwiched between black and white. Under the threat to his family and his own life, he had to work undercover for police officer Jiayun while doing business for the gang leader Zunniya. In order to get out as soon as possible, Ma Tian created an opportunity for the police to arrest Zun as soon as possible and disintegrate the gang, but the police released Zun on the grounds of insufficient evidence, resulting in Ma Tian's situation becoming precarious.