Singapore turns out to be full of animals that never left when the skyscrapers went up. David Attenborough narrates this look at the city-state's wildlife, starting with the macaques of Bukit Timah, a forest reserve troop that has learned to work the edges of a metropolis for food and shelter. Otters get equal attention: a family works the canals and waterways around Marina Bay in daylight, hunting fish within sight of the financial district's towers. The film also follows civets moving through drainage systems and gardens at night, and pythons that use storm drains and green corridors to travel largely unnoticed by residents. Camera crews get close footage of each species navigating concrete, traffic, and manicured parks rather than open wilderness, and the film treats Singapore's dense planting and waterway network as the reason any of this works, an accidental habitat built into a planned city. It is a portrait of adaptation as much as biology, animals rewriting their behavior around a human blueprint.