DR's big, new adventure series for the whole family, broadcast every day during Easter. In the series, Niels tracks down a missing treasure in Northwest Jutland in a forgotten German bunker from World War II. Together with his sister and his friends, he sets off into the depths to find the treasure, because if they find it, they might be able to save their school from closure. However, they are not the only ones looking for the treasure, and the adventure becomes much more dangerous than they thought...