This film tells the story of a female SWAT officer from Lingbei City who goes undercover to infiltrate a cross-border criminal gambling syndicate. Xiao Chen successfully infiltrates the "Geluxiban" organization and, working in coordination with the task force, helps dismantle the criminal operation and captures the ringleader, Xiao Yang. However, at that moment, Xiao Chen discovers that behind all the crimes lurks a mysterious figure known only as "Brother Tiger."