OXO vs Sigue-Sigue (1991)

ER Ejercito and Sonny Parsons played the roles of OXO and Sigue-Sigue Gang Leaders respectively. Though incarcerated, both heads of the two infamous gangs in Bilibid Prison won't stop at anything just to get rid of each other and would do everything even to the point of inciting a grand riot inside for the sake of supremacy .