Big Bang 2203 presents a chilling exploration of the city's underbelly, focusing on the relentless rat infestation that plagues its hoods. Using infrared and night vision, the camera follows the rats' nocturnal activities, capturing their rapid, erratic movements as they scavenge for food. The documentary delves into the rats' social structures, mating habits, and the terrifying speed at which they breed, painting a grim portrait of the war waged between humans and rodents in the urban jungle.