From the campaign:
Lagoon: Land of Druids is a game about forging the destiny of a world. Players lead circles of druids in search of enchanted sites that offer magic powers and the energy you'll need to bend Lagoon's destiny. Each site belongs to one of three different energies that compete to dominate Lagoon.
Every action you take alters the balance of power among these three energies. The energy with the most sites on the board at the end of the game becomes Lagoon's destiny. Position yourself on the winning side of destiny, and you win!