SPL 2: Rise of Wong Po (Saat po long 2)

When an undercover cop gets too close to revealing the mastermind of a drug syndicate, his cover is blown. Double-crossed and under a false identity, he's thrown into a Thai prison, where a guard discovers the inmate - claiming he's a cop - is a bone marrow match for his dying daughter...and his warden may have an even deadlier operation hidden within the prison walls.