In a bustling European city, life takes an unexpected turn when the local zoo's water supply becomes contaminated with PCP, a powerful hallucinogenic drug. The tranquilizer-laced water causes the animals to undergo a drastic behavioral shift, transforming them into uncontrollable, violent predators. As night falls and the chaos rapidly escalates, lions, tigers, elephants, and other exotic wildlife break free from their enclosures. The city, unprepared for such an unprecedented disaster, plunges into pandemonium. Civilians become targets as the beasts roam the streets, attacking anything that crosses their path.

Amid this bedlam, a dedicated scientist and a courageous police officer form an uneasy alliance to tackle the unfolding crisis. Their mission is twofold: to uncover the cause behind the sudden animal frenzy and to protect the city's residents from further harm. Racing against time, they traverse the chaos-stricken urban landscape, encountering numerous perilous situations along their way. With each passing moment, the stakes rise higher, pushing them to their limits as they strive to find a solution and restore order. The situation intensifies, threatening both human and animal lives, leaving the city on the brink of utter destruction.