Max and Mia are very excited about their school trip to the zoo. But when they arrive not much is happening; the zebra is asleep, the lions are hiding and they can't even see a monkey. Max and Mia make the best of it - after all, if you look very carefully there is something to see everywhere. Then they fall too far behind everyone else ...and are locked in the zoo at night! What they didn't realise is that midnight is time the zoo comes alive. Flamingos are doing the flamenco, the lions dance till dawn and the pandas have a party.