Liang Xiaocao grew up in the countryside. To pay for her grandmother's medical treatment, she takes a train to Haicheng to get money from her father. On the train, she meets Lu Hanxiao, the leader of a mafia group in Haicheng. Lu Hanxiao is being hunted by enemies and is severely injured. Liang Xiaocao saves him, and the two form an unbreakable bond.