The game comes directly from Nintendo eShop, you will be able to go online, get updates etc.
After setup process the game will be available to launch on your own account, just as any other game or app you purchased directly in Nintendo eShop.
You are Geralt of Rivia, mercenary monster slayer. At your disposal is every tool of the trade: razor-sharp swords, lethal mixtures, stealthy crossbows, and powerful combat magic. Before you stands a war-torn, monster-infested continent you can explore at will. Your current contract? Tracking down the Child of Prophecy, a living weapon that can alter the shape of the world.