A package containing crystal meth shattered the peaceful life of Tan Doudou, an urban office worker. The sender was her boyfriend, Jin Yuan, who had run away from their wedding seven years earlier. Doudou escaped while being taken to the police station and headed straight for the coastal city the package had come from, searching for Jin Yuan. Jin Yuan was a suspect under surveillance by police officer Qiao Liang and others, suspected of laundering money for a drug-trafficking ring through auction transactions. Unable to let go of their relationship, Doudou was determined to lead him out of the darkness and help him start over. In truth, Jin Yuan was an undercover officer sent by Director Liu to infiltrate the inner circle of Cai Bingkun, the drug-trafficking ring's leader.