Milly's class has won an All-Ireland Climate Action competition and are in with a chance of earning a coveted Green Flag award for their school. Best of all is the prize: a private tour of Fota Wildlife Park! Sure, what could possibly go wrong? But from the moment Milly and her friends arrive, chaos and calamity ensue - and of course, Milly is totally not to blame for the butterfly breakout, the giraffe drama or the unfortunate incident on Monkey Island … Could the school lose their Green Flag before it even arrives?