For their work in solving the crime from the previous movie,Cho is promoted to the Special Crimes unit, while Sing, due to his irreverent attitude, is demoted to being a traffic cop. Cho gets an assignment working undercover at the International School to investigate terrorist activity. Concerned for Cho's safety, Sing quits his job and sneaks into the school posing as a student. Complicating the case is one of Cho's colleagues on the police force, Mark, who tries to sabotage Cho because of his own thirst for glory and recognition. Sing discovers a suspicious map, and determines correctly that the terrorists will act on Christmas Eve. When Mark's forces are defeated, it is up to Sing and Cho to lead the SWAT team to victory. Impressed, Sing's superior promotes Sing back onto the Police Force.
[from the Rim Films Catalog]