Big Snake 5: Monster City

During a chaotic monster invasion in Nanga City, death row inmate Wuchuan escapes prison. The city has become a hunting ground for giant snakes and prehistoric creatures unleashed by a corrupt corporation's pollution. While on the run from the law, Wuchuan must navigate the monster infested streets on a perilous journey to rescue his mother, who is trapped at the disaster's source, a chemical plant, before the ultimate serpent king destroys everything. Aka Da She 5: Guai Shou Du Shi.