The sky is getting dark. In a big city, a little girl is eating her dinner, brushing her teeth and getting ready for bed.

Meanwhile, her mother is putting on her coat and getting ready to go to work. But where will she go, and who will she see along the way?

As the night goes on, follow nurses, cleaners, delivery workers, doctors, police officers, journalists and many more. Meet the people doing the important jobs that help keep the city running all through the night, ready for the next day to come.