Danse Macabre (2007)

The film begins with an assassination attempt at the private clinic of psychologist Tran Ngoc Tam. A criminal investigator named Sang is assigned to the case to investigate and delve deeper into criminal psychology. During the process, another murder occurs: the death of Dr. Tam's secretary.
Through Tam’s cooperation, Sang uncovers a drug trafficking and manufacturing ring. Assisting Sang in this special task force are Long, a scout from the anti-narcotics unit, and a cabaret dancer named Hang Nga