Class beauty Ruan Sitian organizes a free tour of Europe, requiring documents to be handed over and contact to be cut off. Gu Qinghuan detects suspicious signs of fraud, reports it to the counselor, but is isolated and bullied by the whole class. To avoid risk, she chooses to enter a closed factory for an internship. Shortly after, the classmates participating in the trip lose contact at the border. Gu Qinghuan escapes unscathed by avoiding the risk in advance, and subsequently assists the police in uncovering the truth behind the transnational fraud syndicate.