From the box back:

Discovery is an exciting and fast-paced adventure game for 2 to 6 players. The players travel around the world, their aim is to find the fabulously beautiful Paulig diamond. Being on the road, the travellers fill their pouch with the found coffee beans, try to avoid greedy robbers and get themselves new knowledge about coffee, travelling and the world.

To win the game you have to find the diamond and take it to a safe place.