The Hidden Treasure (2022)

As Niels and his sister's school faces closure, he discovers a clue hinting at a potentially significant treasure hidden in a long-abandoned World War II bunker. Joined by his friends Tania and Charly, along with his sister and her crew, they embark on an adventure to uncover the treasure, hoping it will help save their school. However, they soon realize they aren’t alone in their quest, and the search turns out to be more perilous than they anticipated.